if all you want is more members, best thing to do is be a huge douchebag and spam every site and every email and every forum and every popular youtube video you can find.
partnering with MONTA, SSD, or Calle for them to advertise you, would mean lots of money. either that or, you'd have to post their logos and promote their brand as much as possible on this site. and as for the red bull idea.... you guys do realize that "sponsor" means you contribute money to them, yea? firstly, red bull's fuckin loaded they don't need any money. secondly, we don't have much money.
i do know the field marketing manager for red bull in toronto, as well as several other red bull contacts. but i doubt that'd do this cause any good.