If you are still waiting for Halo Reach and don’t have anything better to do, than you can probably enter in a contest by Bungie. In this contest, you have to design the Halo Reach logo which will be used in one of the scenes in the game. If Bungie likes your design, than you will see your own design in Reach, but there is some criteria: Your emblem must consist of only two colours. Your emblem must be able to be identified if the secondary portion is toggled off.
Head over Bungie’s official site to learn more.