Integrating Microsoft Office Communicator 2007 R2 - Samples?

Basically, I can't seem to find any good resources out there for examples. I attempted to download a couple of msi from microsoft.com, and one of them included isntalling a solution file (.sln), but when I open the solution I can't actually compile the application.

Basically, what do I need to actually get started with getting the necessar开发者_StackOverflowy libraries and sample code?

A good resource to get started is the Programming for Unified Communications book - this covers R2 quite well. Check out the answer here for a bit more detail