You know when right-click on a highlighted word or phrase an option is to search google? How hard would it be to add a search craigslist option as an extension or something? A setting could be to choose which CL (http://losangeles.craigslist.org/) and away you go!
For Chrome you can do something like this http://superuser.com/questions/179347/can-i-add-right-click-options-in-google-chrome
fuck yea, that’s awesome. Thanks!