There are a series of upcoming Sametime 7.5 launch events throughout multiple countries. The kickoff event was in NY City this week where Mike Rhodin, Ken Bisconti, and other delivered a key note address that had everyone in attendance excited. The keynote is now available on webcast.
Additionally, next week, Dan Kehn, a Senior IT Specialist at IBM will be speaking about Using the Sametime Client Integration Guide for customization and plugin development. As Mike and Ken noted, Sametime 7.5 plugin development platform on eclipse allows beginner developers the tools and methods needed to create plugins for Sametime. I strongly urge you to view the Sametime 7.5 launch webcast followed by Dan's.