Jobs for Moonlighting Geeks?

BreadWinner asks: "My wife and I are adopting a baby in 2003 and it's very expensive. I work for a non-profit that can't pay me what I feel I'm worth. However, I really like my job, my boss, the time off, and my co-workers. So I'm considering moonlighting. I've done private contracting, but I don't think I can do my private clients justice when I'm working full-time. So what kind of job can I find that: I can leave at the job; maximize my $/hour? Anybody done commission-based electronics sales? I'm not an uber-geek, but I'm interested in whatever you folks at Slashdot can suggest."