I've been using CS3 for a couple of weeks now and i must say that CS3 is much better than CS2 once you get used to it. The workspace is improved. Extraction is more precise. Greyscale tone, mono colors and RGB profiles are enhanced. One other thing that I've experienced with CS3 is that it handles huge .PSD files much better than CS2 and doesn't need too much resources like in CS2. In preferences you can modify CS3 much better than in 2. you can edit the numbers of UNDO's, change the type preview size and a lot more. and I really liked the new tools like quick selection tool and some others. I reccomend it to you Bazz and every other artist who has been using CS2.
PS: forgot to say that Layer Menu Docks are more friendly and also the filter gallery.
just go and get it right now (IMG:style_emoticons/default/8824.gif