I'll try and get some active members to register here. Does our referrer really need to PM you? Vbulletin allows you to track referrals by giving people a specific link to register through.

http://www.talkfreelance.com/index.php?referrerid=157 would be my referral link, you would have to replace the "157" with your userid. You can view your user profile to see your referral count also.