just a quick thought, quite a few people signing up arn't posting in the introduce yourself section, is it possible to put a lock on new members accounts until they have posted in there? i know a few other sites im on have this feature, this will help current members understand where people are from, what they drive, etc and also stop spam members from signing up and posting random stuff
(or albanians hacking us lol although i cant see them posting 'high i'm [insert name] i'm form albania and will be hacking your site this evening)