Ubuntu 10.04 X64 bit is just great,Very fast and snappy even though its using 1gb idle,much more responsive that 7 has ever been for me...login is instant and responsive.
another cool feature in linux ive just found out it when you put your cursor over an audio file it plays the track in the background without you even needing to open a application to listen too it until you move the cursor off the track file and then it goes off,very good.
Everything worked for me,Audio...graphics drivers updated automatically,I've just installed Flash and Amsn using Terminal (with help from Google)