Microsoft Codename: Tahiti?

Codename "Tahiti" is a fast, easy way to share documents and screen views with small groups of friends or coworkers; anytime, anywhere. Use Codename "Tahiti" to put your heads together and collaborate.

From what I see Tahiti will let you share your desktop or a specific application to upto a group of 15 people. Each person gets a customized mouse pointer, can request control of the shared application or desktop, push documents (handouts) to the other users and even track changes if working in a Word document.

Now if Microsoft can out a bit more effort into the website to make it render properly in Firefox. No excuse for not making a website cross browser compliant.

Link:
http://codenametahiti.com