The Team Fortress website announces a "Tomb Contest" where Valve and Square Enix are opening up the opportunity for the community to create promotional Tomb Raider-themed content for Team Fortress 2. The winning entries will be used as preorder bonuses for Lara Croft and the Temple of Osiris, while rejected entries will probably make for some epic nude Lara matches on Valve's private servers. This page has the complete rules and here's word on how you can help promote the new Tomb Raider game:

Square Enix has agreed to open up the Tomb Raider IP so that we can have a contest. All of the Tomb Raider games are fair game, so if you've been waiting for your chance to put the heavy in short shorts, this is it. (Please don't do this.) You're welcome to pull from your favorite villains, heroes, levels, or any bit of lore. Because this upcoming game takes place in the classic Tomb Raider universe, we'd like to steer you towards the classic Lara games, rather than focusing on last year's "Tomb Raider".