I actually wrote a CL crawler in Ruby - https://github.com/marcamillion/craigslist-ruby-crawler https://github.com/marcamillion/craigslist-ruby-crawler I used

I actually wrote a CL crawler in Ruby - https://github.com/marcamillion/craigslist-ruby-crawler https://github.com/marcamillion/craigslist-ruby-crawler I used it to crawl for freelance web dev gigs, but it can be re-purposed to do anything.