Neither is especially useful in my experience. The value proposition is pretty much entirely limited to videochat, which is probably why both cameras on the iPad 2 suck so much for still photography. However, videochat still isn't all that common.

I never used videochat, until I had a baby. Now being able to chat with the tablet would be great.

Apparently Skype is supposed to work with my Galaxy Tab since yesterday, can't wait to try it out.

Giving a camera-free Kindle to someone from my family for Christmass would be kind of pointless, because then we wouldn't be able to chat...