There was a discussion in the "Craigslist Crusher" thread a few days ago that basically pointed out that because Craigslist's main advantage over everyone else

There was a discussion in the "Craigslist Crusher" thread a few days ago that basically pointed out that because Craigslist's main advantage over everyone else is its user base, and not its pretty site or awesome features, it would be foolish for them to offer an API, in which others could mooch off the user base. I tend to agree: From a business standpoint, a Craigslist API has more cons than pros.