PS: I have been looking into agents (because I think it sounds like a good idea) and cannot really figure out how to find one for what we do. How did you find your first agent/agents in general??
Well first one I actually met was at a corporate event and after I showed him a few tricks he was glad to be my agent. However other agents I have contacted them and generally they will either ask for a meeting (rarely) or evidence of work (most of the time). So generally they want testimonials, a bio, a website, footage of part of some of your work. Sure this is a pain in the [edited] the first time, but after you have it all compiled its basically becomes like a small promo package of who you are, what you do, who you have worked for and the results you receive. If they are pleased with the information you have provided generally they are always happy to represent you. Put it this way the more gigs they find you and the money money they make you, the more money they get.
Most of my agents will tell me here is this show details, send me a quote. Lets say I send through $500. The agent might charge them $600. Takes $100 off the top. however I never know how much they take all I know is I get how much I want and I'm pleased with that when it comes down to it.