SonicStorm of Battleground: Halo contacted us about a contest they're running:
BattleGround: Halo in association with GameSpy Industries is proud to announce our first ever Halo contest! For all you avid fan fiction people out there, we have launched a week-long contest to search for the best fan fiction out there! Grand prize is a free pre-ordered copy of Halo! For more details on the contest, head on over to Battleground: Halo!
Judging from the fan fiction material I've seen so far, there pretty good-sized group of budding authors in our little pre-release community.