Undoubtedly the biggest web app of 2007 was Twitter, the simple web app that allowed you to send a text message and have that sent for free to anyone that followed you. Combined with a simple API, useful web apps could be created to send you txts when your train was going to be delayed or when you got a new email, etc. However, this has all stopped in the UK, Europe, and Australia for the time being as Twitter has finally turned off the ability to send messages (although you can still update your status by sending a txt). The full details are below in an email that was received by those registered with the service in affected areas and also on the twitter blog:
Hi,
I'm sending you this note because you registered a mobile device to work with Twitter over our UK number. I wanted to let you know that we are making some changes to the way SMS works on Twitter. There is some good news and some bad news.
I'll start with the bad news. Beginning today, Twitter is no longer delivering outbound SMS over our UK number. If you enjoy receiving updates from Twitter via +44 762 480 1423, we are recommending that you explore some suggested alternatives.
Note: You will still be able to UPDATE over our UK number.
Before I go into more detail, here's a bit of good news: Twitter will be introducing several new, local SMS numbers in countries throughout Europe in the coming weeks and months. These new numbers will make Twittering more accessible for you if you've been using SMS to send long-distance updates from outside the UK.
Why are we making these changes?
Mobile operators in most of the world charge users to send updates. When you send one message to Twitter and we send it to ten followers, you aren't charged ten times--that's because we've been footing the bill. When we launched our free SMS service to the world, we set the clock ticking. As the service grew in popularity, so too would the price.
Our challenge during this window of time was to establish relationships with mobile operators around the world such that our SMS services could become sustainable from a cost perspective.
We achieved this goal in Canada, India, and the United States. We can provide full incoming and outgoing SMS service without passing along operator fees in these countries.
We took a risk hoping to bring more nations onboard and more mobile operators around to our way of thinking but we've arrived at a point where the responsible thing to do is slow our costs and take a different approach. Since you probably don't live in Canada, India, or the US, we recommend receiving your Twitter updates via one of the following methods.
m.twitter.com works on browser-enabled phones
m.slandr.net works on browser-enabled phones
TwitterMail.com works on email-enabled phones
Cellity [http://bit.ly/12bw4R] works on java-enabled phones
TwitterBerry [http://bit.ly/MFAfJ] works on BlackBerry phones
Twitterific [http://bit.ly/1WxjwQ] works on iPhonesTwitter SMS by The Numbers
It pains us to take this measure. However, we need to avoid placing undue burden on our company and our service. Even with a limit of 250 messages received per week, it could cost Twitter about $1,000 per user, per year to send SMS outside of Canada, India, or the US. It makes more sense for us to establish fair billing arrangements with mobile operators than it does to pass these high fees on to our users.
Twitter will continue to negotiate with mobile operators in Europe, Asia, China, and The Americas to forge relationships that benefit all our users. Our goal is to provide full, two-way service with Twitter via SMS to every nation in a way that is sustainable from a cost perspective. Talks with mobile companies around the world continue. In the meantime, more local numbers for updating via SMS are on the way. We'll keep you posted.
Thank you for your attention,
Biz Stone, Co-founder
Twitter, Inc.
http://twitter.com/biz
Now this has upset a LOT of users (especially in Australia) but is the general outcry from the web community really justified? As Twitter themselves say, it could cost them nearly $1000 per user per year to send txts and with 2.2 million users that ain't cheap. It has always been a mystery to me as to how Twitter makes money and how they are able to send all these txts for free so it comes as no surprise that they have finally stopped doing it.
But what about the alternatives? I'm using a mac and an iPhone so I've gone for the obvious choice of Twitteriffic on both which does a pretty good job. On my mac, I get a little chirpy noise and a popup when I get a tweet which works a lot better than an SMS in a lot of ways and this is similar on the iPhone. The only downside is that the iPhone doesn't support 3rd party apps running in the background so at present you have to open the app to see if there are any updates which is a bit of a pain. However, this is due to change with iPhone Firmware 2.1 which is hopefully going to be with us some time in September.
Once the ability to receive twitters from Twitteriffic seamlessly occurs, I think it will prove a lot more successful than the txt message route. Firstly, because it will cost nothing to reply (whereas previously it was very easy to reply to a twitter from a txt and thus get charged for it) and secondly because new features can be added to the service. Twitteriffic already supports location awareness on the iPhone so people can see where I am twittering from - a small improvement but an improvement none the less.
In response to everybody shouting at Twitter about this issue, why don't they instead complain about the mobile phone companies who are so greedy in the affected countries that they refuse to do a deal with Twitter? It comes as no surprise to me that in the UK the cellular networks refused to budge on pricing but that is no fault of Twitter who have been paying so much over the last year and a half to make a great service at absolutely no cost to the end user (not even adding advertising to tweets which would seem an obvious money making route).
So in answer to "is Twitter now dead" I would say no! There are still several uses for it (e.g. I use it to keep a micro blog on my homepage) and with several applications for all types of phones it is still easy to stay updated. It will become really useful for me however when Apple release the next iPhone update with push technology - then it will be as if nothing had even changed.
Update: Amusingly it looks like someone is already trying to cash in on the lack of SMS from Twitter around most of the world. Apparently tweetSMS will "send you individual, hourly or daily updates from all (or just some) of your friends" for a "very small fee". We'll see how small that fee is when they launch I suppose…

Posted by sneaky at 6:32am on August 18th, 2008
I heard about a mobile software..Messmo for sending free SMSs..
Posted by daviddead at 5:25am on August 25th, 2008
Yes..I have used Messmo on my mobile..it is really a great software..you can send free SMSs to your friends and can enjoy much more features.
Posted by karan at 6:16am on August 28th, 2008
I want to get Messmo on my mobile.I have Nokia 6275.Is my mobile compatible for Messmo?
Posted by david at 6:17am on August 30th, 2008
Yes dude,Nokia 6275 is compatible for Messmo !!
Posted by Ben Dodson at 12:36am on September 5th, 2008
Hmm suspiciously spammy looking comments - amusing how none of them have the link to the messmo site though (http://www.messmo.com/ for those that are interested) - it looks dodgy and isn't a replacement for Twitter anyway. As I mentioned in the post above, just download the Twitter client for your relevant phone type and all will be good!
Posted by mobilecheckm at 10:52am on September 8th, 2008
Wow!! Twitter is cool application..I am eager to use it!
Posted by ccrazyone at 8:11am on September 12th, 2008
yeah!!
its nice application..I love it..
Posted by BOBY at 6:25am on October 9th, 2008
Twitter, is really 3 web apps in one, but the thing I see it's most used for is for communication, people talk through it. I think that Twitter is taking IRC to the next level. It's allowing you to talk, right through the browser, and even from your phone or a jabber client.
Posted by mobifun at 7:24am on October 20th, 2008
Twitter has killed its outbound SMS services outside of the United States, Canada or India, and with it a potentially highly lucrative business model in Europe.
Posted by rajeshm at 11:13am on October 23rd, 2008
Twitter has very good usability. Everything is really simple to use. Posting is just as easy hitting a submit button. Adding friends is done by a simple click of a little link that says Add.
Posted by Dixie at 6:32pm on October 28th, 2008
You write very well.
Posted by shekharg at 5:59am on October 29th, 2008
The guts of Twitter is a system that quickly matches new messages coming in from members with the followers who have signed up to receive them, then retransmits them using each follower's preferred channel: instant message, SMS, or the Twitter website.