Vista is here to stay. I'm not going back and the experience will get better as the hardware catches up.
This is what Craig Pringle says about Vista in a nice article that I recommend everybody to read. I agree with him. Every time I see somebody complaining about Vista is not really a problem with Vista, the OS, it's a problem with drivers that have not been specially written for Vista. I have my Samsung Q1 fully running Vista and I never have any experience that has made think about going back to XP. And my Q1 uses a Celeron M at 900 MHz with 2 GB of RAM installed.