Agent-led Contest (Joan Paquette) for children's and YA writers on the querytracker.net blog.
All White for Twilight fan fiction contest (win limited edition Twilight Saga set w/ white and red covers!!)
The Guide to Literary Agents blog is having its monthly "Dear Lucky Agent" contest and it's for PARANORMAL/Urban Fantasy writers this time!!
Authoress Anon's Secret Agent contest! Polish your first 250 words for a completed adult commercial manuscript (not SF/F) or a completed YA manuscript. Rules HERE.
Also, not a contest, but I always squee with an author when her book is OPTIONED AS A FILM!! Especially when the acquiring studio is Summit. How awesomesauce is that!