Won't somebody please think about the children?!?!
I'd love to get (and would pay for) a distro for kids. A $5 or $10 cd/dvd at Toys'R'Us that just lets kids use the computer safely.. that would sell easily to parents who share a pc, but know nothing about downloading distros and burning cd's. Think about it: Little kids, tweens, guests, etc. get to use your pc/laptop without being able to screw-around with your stuff. Revive crappy old equipment for good use. Protect your existing system.
A Knoppix or DSL type of live cd with simple menu (sponge-bob theme, sesame street?) and programs, games, edu software for kids. Tweens can have their internet access to do homework or check mail and save stuff to pen drives or cd's (anything portable, lock harddrive access out).
If anything like this already exists out there... PLEASE let me know.