I have the 1000 bounce flash and am very happy with it. It turns on automatically when connected to the camera, and the camera automatically knows it's there, which is convenient, no messing about with camera settings.
The difference in photos is stunning, no shadows behind people, and much more even lighting. I generally keep the flash set to 'low' with it for indoor shots, and keep the diffuser pulled down.
It does often add a slight yellow cast to photos, but not directly because of the flash, but because most ceilings are not true white, so the light gets colored a bit.
For ~$100 it's a no-brainer, in my opinion.
I am at work, and don't have any examples to post (or a place to post them, I'll set up a pbase account tonight).