>> Yeah but that still sucks, because people rarely know which neighborhood they are in.

"rarely" is a tough word. I have found the city to be pretty well demarcated unless you are talking about people confused about minor issues such as what counts as Lower Haight and what counts as Upper Haight.

>> I guess you haven't really used padmapper if you don't understand how anyone could improve craigslist for you.

I used Padmapper as a newbie to the city but quickly found that the latency between postings on CL and the corresponding crawled updates on Padmapper were so high that the postings would have already been hit by a few dozen responses by the time I got it and in a hyper-competitive housing market like SF, this made all the difference.