Hey man thats really cool. And know your talking my kind of prize. But i can go and send some joins but it may be 2005 till you actually get a 150 webmasters to send 5 joins apiece. So if you set a date to give it away even if there are not 150 entered that would make it alot more intriging to sign up.
Im not saying you wont get 150 webmasters fast but from talking to people it also could take along ass time to accomplish that..
nice site by the way..
peace
localg