If you were a twitter IM addict, I have some bad news for you. After a long struggle to fix bugs and issues with Instant Messaging, twitter has finally accepted their short comings and have removed twitter messaging.
During recent months, twitter has been seeing huge traffic and popularity which its basic architecture was never prepared. Even after the development team trying out various fixes, the issues and bugs never seemed to fade out. It just increased!
And guess what twitter did? It removed IM functionality completely stating that it does not want to deliver a flawed product. Twitter would further work on improving the code, which is now open source and provide a flawless product.
Twitter is also encouraging third-party applications built using Twitter API to be used by Twitter IM users. However, except Excla.im, there are not much third-parties who have impressive applications created based on Twitter.