If you're going to go to next year's Comic-Con I have a few words of advice: bring lots of cash. Comic-Con is filled to the brim with vendors selling every nerd toy you can imagine. There are limited edition action figures, dolls, and collectibles. Don't believe me? Check out this booth with Bif Bang Pow! toys. And yes, that is Talking Tina from the Twilight Zone. Bif Bang Pow! makes tons of geeky toys like limited edition Dexter toys and a Dr. Who Tardis bobblehead.
Check out Bif Bang Pow!'s site for more.