[eznet]

"If CraigsList had an API, it would be a game-changer."

Agreed. As a long time CL user, I have thought the exact same thing. Short of API functionality and extensibility, I know of numerous scraper/mashup applications that utilize CL data. Unfortunately, this does fall far short of API extensibility and likely leads to liability in concerns to "stealing" CL's data - I would be apprehensive about investing 'too much' on any project that relies on scraping as chances are that the project will be killed by CL before reaching the critical user mass of "success".