Micro-Blogging is one of the Web 2.0 technologies that has been getting a bit of run of late its one of the tools a seemingly new breed of politicians are using to garner support and awareness of their movements. But its also used by a growing number of everyday people and businesses as a method of pervaying certain messages and other sometimes seemly useless pieces of information. Maybe one of the keys to twitter's success is it fills the gap between availibilty and straight calendaring. I think the scope of what could be done with twitter when you start to intergrate this into traditional communication technology should see this technology expand even more (well as long as we get some creative people pushing the limits). Exchange mostly provides the same type of information in different formats so using the Twitter API and the Exchange API's you can start to combine the functionality of both systems to start providing different new funcationality. Eg in this sample Im using
Pushing the Envelope in Messaging and Office 365 Development