The Scariest Horror Game Comp is the only one that I know of, and that ends in two days. But from what I've seen, competitions started by new members or members that don't have a very active forum rep don't seem to gather a lot of interest. It might help matters more if you held off on starting a contest until
you have something to contribute to the prize list, rather than just pick a theme and then rely on the community to fill up your prize spots. Just my two cents.
I wouldn't mind jumping in on a James Bond Comp. Would finally give me the excuse I've been needing to remake the mulitplayer Archives map from the good 'ol 64 days.
Kravenwolf