After 2+ years working at Writers House, I started my own boutique agency in 2007. You can find out more about me and Fox Literary at Publishers Marketplace and AgentQuery. My Twitter, predictably, is @dianafox.
If you really want to you can probably find me on Facebook, but I don't recommend it as I'm rarely there and don't add people I don't know. And yes, I had a MySpace once too... didn't most of us?