I may be a bit slow in getting them updated for 2012, since I'm currently occupied with finishing Volume 3. The only major change will be the Grand Prize, which is To Be Announced.
I had intended to run a non-art based contest this September, but preoccupation with V3 is limiting my focus. However, if anyone has ideas for other types of contests or reader events you'd like to see, toss 'em out in the comments here. After V3 is printed, we ought to have more time to try something new.