Microsoft is launching it’s new Unified Communications Solution on Nov. 17:

Microsoft Lync 2010!
http://www.microsoft.com/en-us/lync/default.aspx

Lync is Microsoft’s new solution uniting voice, IM, audio-, video- and web-conferencing into a richer, more simplified experience.

Try a fully functional version of Lync Server 2010 RC in your own environment: http://www.microsoft.com/en-us/lync/try-it_lync.aspx