Just thought I might make mention that on the Wizards of the Coast website there are to be a large number of contests for homebrew stuff (along with D&D trivia games and the like, etc). 1st and 2nd placers each get prizes in the way of D&D books materials.

There are monster-making contests, item creation, BBEG contests, spell-making contests, NPC-making contests, etc etc.

UnCon Event List

If new to their site and have any questions, feel free to ask. I didn't even know about it till suddenly it was upon us last year, so a number of us complained a good deal and they seem to have gotten their act together and are advertising it around.