They're a little rough right now, and halotracker's ranking formula isn't very good (overall games played is far too large a factor imo) but it's better than nothing. Only GFAQS member I saw in the top 300 was blite, grats buddy! The rest of you can see where you stack up against the competition at www.halotracker.com!
P.S. - if you choose to sign up for halotracker, don't forget who referred you ;)