LA Times' (http://www.latimes.com/theguide/la-icu,0,7058952.htmlstory) collects the stories of SoCal residents who have connected and missed from Craig's list Missed Connections section: http://losangeles.craigslist.org/mis/.

Check out the interactive map comparing LA singles by gender, age, and location: http://www.latimes.com/theguide/la-icumap,0,2003683.htmlstory