Fantasy Movie Studio (like Fantasy Baseball)
Create a "fantasy movie studio" entertainment/subscription site, similar to "fantasy baseball" (a sophisticated prediction game based on the real stats of a live MLB season). Partner with the Internet Movie Database for existing information --rather than collecting your own.
Rather than RBIs and other stats that baseball uses, use stats that apply to the entertainment industry like amount of money each actor brings in per picture, a "diva"/"temperment" scale (for qualitative information that effects quantitative results), etc. to determine how much money a film will bring in for "the team" --i.e., movie studio. Films can be picked from "in production" category in the IMDB. Users could also customize such features as creating their own film studio, negotiating contracts for actors, etc.
With this online entertainment/subscription service you could also build everything on your "team" from the actors to the director to the set designer.
Reward: Free subscription to the service and credit.