Jay, if you've got the AVR32 IDE working under Vista, I'd love a nudge in the right direction.
I need to get my kit from Atmel (they let us play with 'em, and promised to send 'em, but logistics meant they had to take 'em to the next workshop...), and I've been doing my straight ATmega stuff under Linux or XP (because the folks I deliver to run XP), but a few things about how Atmel had their Eclipse plug-ins working on Windows were intriguing enough to make me want to run there.
I'd also love to get instructions to let others get the straight AVR environment running on Vista, I got it working on my machine, but I forget how, and one of my customers doesn't have a full build environment, they can just program the chips with my binaries. Means they can't do simple timing tweaking when they change the hardware, so I've got to recompile for everything.
(However, for the next month, at least, most of my work will be consumer code on Windows that'll have to deploy to both XP and Vista. Ahhh, the joys of notYET and C#...)