I was about to post exactly the same thing
My colleague and I have tried Vista here at work and we've gone back to XP on our machines, and installed XP on a few new laptops we've received that came with Vista (Good job not giving us proper XP drivers, Sony )
It's too buggy, generally sluggish and I dont like the interface (although I might get used to it). There's plenty of software and drivers that don't work properly, and I can't see a major advantage of using it over XP. No doubt it will improve with time/service packs