It's actually a pretty handy language to learn. Me and my mates talked about it back in Uni - imagine you're in a club and you want something, and your mate is at the bar. Bit of sign language, and you're sorted, no matter how loud the music :)

Right? That's part of why I want to learn with other people. Not only could I talk to people who are hoh or deaf, but it'd be fantastic to communicate without having to yell across the room. Or to have a semi-private conversation without the people around you hearing it lol.