To spread the word about their September releases, Warner has set up several online promotions, some with prizes!

For Smallville: The Complete Seventh Season (out September 9), they’re asking fans to create a “trailer tribute” (video clip remix) and share it with friends. The highest-rated clips will win a Nokia 37″ television or copies of the DVD set.

For Supernatural: The Complete Third Season (out September 2 - next Tuesday), there’s a “Hunt The Demons” game where you “create an avatar to confuse those that seek you… Can you figure out who’s human and who’s a demon?” (I really should watch this show at some point — I thought Jared Padalecki was really cute when he was on Gilmore Girls.)

For Chuck: The Complete First Season (out September 16), there’s a contest AND a game! Online clues provide tips on decoding a secret message for a chance to win a $2000 gift card.

Doesn’t anyone but me do simple random drawings any more?