Libraries, teenagers and 2.0?

I’m doing a short presentation at an event in Wolverhampton in October (“Inspiring the iGeneration – Web 2.0, teenagers and libraries”) and I’m on the hunt for fun examples of how libraries (especially public libraries) are using “2.0” to attract teenagers.
I’ve got a few examples, but I’d love to hear about things you’re doing at your own library (e.g. gaming evenings, web content creation, etc) or things that you know other libraries have done. Even if it’s not really “2.0”, but it’s worked well in getting those teenagers in, then again I’d like to hear about it. I’m also really struggling to find examples in the UK, so if you know of anything, please let me know!
There’s been quite a bit of negative discussion recently about teenagers and computers in libraries (e.g. they use them to play games rather than to do their homework, or spend all their time on MySpace/Facebook/etc). I’d be interested to hear your comments about the subject (either negative or positive).