Unrelatedly, PadMapper is excellent (better than other Craigslist mappers I could find): it has a great filtering system, seems to fetch fresh results more often, and can alert you about new places. I found my current place using it.
I concur. Padmapper gives me a quality of life advantage over my peers since I can find exactly what I want and monitor for deals while they're getting the luck of the draw off CList.