Microsoft also tend to be a little backward in coming forward sometimes. I've mentioned the brilliant deal on Office 2007 available to many and time is running out for the most quietly announced Windows 7 cut-price offer too. Now I discover they have a Wave of their own, obviously hoping that this will prevent Google claiming the word as their own!
An attractive site (Google still have a bit to learn there) sets out in reasonably plain English what they're up to and links to various betas, trials etc. Worth dropping in from time to time.