Craigslist has added many new cities and are categorized by state now.
Q: What is craigslist?
A: Local community classifieds and forums - a place to find jobs, housing, goods & services, social activities, a girlfriend or boyfriend, advice, community information, and just about anything else -- all for free, and in a relatively non-commercial environment.
Q: How did craigslist get started?
A: In early 1995, by Craig Newmark, in San Francisco, California. A little more history is here.