This one from BroadUniverse:
Odyssey Con, a science fiction convention in Madison, WI, is sponsoring a contest for 500 words or less, paragraph form, to be judged by Bruce Boston. Preliminary details can be viewed at http://fibitz.com/oddcontest.html. $500 to winner; $10 entry fee. PayPal should be available on the OddCon site by December 1, but you can also mail a check or money order.