I'm sure this is applicable for all 12 of you who want to develop specifically for the Vista platform, but i thought I'd mention it anyway.
MSDN now has a Windows Vista MSDN page. There is some great info about developing for the new interface as well as info about the new malware protection system and heaps of other bits.
Also - Channel 9 have a great interview with Chris Jones who is the Dev manager for Vista. Its also worth checking out. Chris has some great comments about the vision behnd Vista. The more I hear about Vista the more excited I am about it.