Communicator Automation API in Action - Outlook Add-In
I've been working on the an Add in for Outlook, using VSTO and the Communicator Automation API, which allows you to view all of your contacts while it Outlook. Outlook already gives you presence and functionality to communicate with the people for the currently selected email, but if you want to communicate with some one that isn't included on the original email, you'd have to switch to Communicator.
The idea behind this Add-In is that a lot of people spend the majority of their day (like it or not) in Outlook, so why do should you have to switch to another program to get presence and communicate with them?
The application with source code will be made available soon at http://code.msdn.microsoft.com/Communicator4Outlook