Hi, I'm a Windows Vista user (Home Premium) and was thoroughly impressed by the rethought interface. I did have a few ideas for it though. 

My first thought when I joined was that, I admit, am using Safari. It made me feel a little guitly, briefly, but when I thought about why I realised it's really just the fonts. I am a big fan of the new Segoe UI font, and I am fighting the urge to use it on all sites that I develop (until I realise only Vista users can access the font).

There's been a big improvement in the anti-aliasing on Windows since XP. Vista is the same (thankfully with aliasing on by default- to an extent), but it would be nice to see something more (I can't believe I'm saying this) along the lines of that of OSX. You know that the majority of Vista users are using LCD-style screens, so why aren't you optimising it for that audience? Maybe consult with the ClearType team and see if there's a way for the user to customise their experience depending on their preferences?

Just an idea, interested in your response...

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Wake me up in 2010 for W7. For now I'm waiting for Vista to boot.