http://www.lehnerstudios.com/stuff/applestorechat/
Enable video chat through your protocol, it's fucking fun.
My friend and I convinced these two girls to get an Apple Store employee to come over, and he came over, looked at us, said something into his mic, and walked away.
Unfortunately most of them are down because Apple stores are mostly closed, but I'm looking forward to getting on one of these during prime store hours and saying silly things to random passerbyers.