+1 to meeting a lot of flakes. I've found that Craigs List hasn't been worth the time. A personal CL highlight was driving out to Morrison to get auditioned by a drummer that had trouble finding one. lol
Networking and word of mouth works much better. Get out to shows, chat up the band(s), make it known you're looking for something, make sure to have audio samples available. Serious players will want to hear what you've got before they spend the time & effort to bring you in. They don't have to be pro quality recordings, most players will understand the "live recording" stuff. But having something available is definitely a good idea. Also, have a nice business card that you can hand off with basic info (like a link to your audio samples

)... Just telling someone your name on a set break is a good way to get forgotten.
5sg.