UCMA has finally shipped! For those of you who would like to download it, the full download is at
If you would like to see a webcast about UCMA, see the following.
Perhaps even nicer, the documentation for UCMA is also now on MSDN at
UCMA allows you to create signaling applications for Office Communications Server using SIP. It is most useful for creating bots, broadcasts, and other IM solutions. The download above includes two samples - a broadcast IM and a bot.