Being able to easily adjust the white balance in post-processing is VERY useful. And, the additional bits per channel can come in handy when color correcting an image. However, as others have said, RAW files take up a lot more space (less images per card, more space on your hard drive, slower response from camera, etc.).
I usually use RAW when shooting weddings, or anything that has tricky lighting. Of course, if white balance is your only concern, you can always do a custom white balance on the camera and shoot JPEG, but in some dynamic situations you just don't have time to fiddle with that.
The Canon 20D's I shoot with have a nifty feature... RAW+JPEG (the best of both words, or the worst, depending on how you look at it). If I know that I'll have ample card space, I shoot in this mode... gives me the "instant gratification" of a JPEG, while simultaneously saving the RAW file to the card just in case I need it in post-processing.
--Mike