If you've got an iPod, don't install Vista on your PC or let your Ipod be run on a Vista PC at the moment. Vista has serious 'incompatibilities' that can break your iPod.
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docs.info.apple.com]
An upgrade is coming.
On the same topic, isn't Microsoft in court right now for introducing incompatibilities that meant that DR DOS couldn't work on Vorbis machines? What an evil bunch they are, really.
Also, the ELU of Vista apparently makes it illegal to run Vista on an emulator. Which means you can't legally run it under parallels or VPC. Boot Camp is not technically an emulator though...
Not that I have, use, or want Vista, just a heads up to try to stop people ending up with busted iPods. I'm pretty sure it won't tell you this on the Vista box.