I understand your enthusiasm for your new site, but this just comes off more as spam than promotion. The terms "awesome" and "isn't much on there yet" really don't make sense in the same description. I already signed up on your site last week when you were promoting it earlier and look forward to seeing your site grow. Most people prefer a professional approach to things though...just thought I'd give my opinion as part of the demographic you're targeting.
Or are you a new member of that site working toward getting the 500+ members to put you in running for the giveaway that was offered?