We are also hiring on Craigslist and actively looking for developers (aka rockstarts, pirates, ninjas, heroes, barbarians, wizards of oz) with knowledge and experience on perl/mysql/sphinx/javascript-jquery/css
we do what we do, our frontend is as unsexy as it looks (and I really hope this will change in a future) but we have a lot of interesting problems related to massive amounts of data and traffic/spam/scaling.
mail at pablo at craigslist.org