Just received my 12" revB last week. Love it exept for one thing: the output from the built-in speakers is poor, especially in the treble range. Or I have a defective unit.
It's especially noticable on the recent Apple Expo keynote stream at:
http://www.apple.com/quicktime/qtv/expo03/
The speakers make these little "pops", especially when Steve says "Seventeen Inch". I hear it also on music when played with the volume at maximum. Perhaps this is just a limitation of the small speakers.
Can anyone tell me if they are having problems, too?