Craigslist is a good place to start, but you need to be discerning. Find one that has realistic expectations for the job they are asking, and generally it's a good thing when they don't give you a price tag right up front because that means they will pay you based on what you're worth and not some arbitrary number.

My job asked a simple question, what was the title of the book written by 37signals, which reveals a lot about their perspectives. They also included enough information in the Craigslist ad that convinced me they were a technically strong company.