This is a great idea. I don't care what my 7 y.o. daughter plays, but she hasn't played much, so it'll take me a bit to get her up to speed on some games.
She plays the lego games (Indiana Jones, Batman) and I could let her loose on Burnout Paradise.
The CoD games I'll have to educate her for awhile so she doesn't just stand there and get killed the whole time.
Time zone could be an issue for us for some weekday games, but I'll get her set up with a live account and post her GT as soon as I have it.