Starcraft 2

According to Kotaku (and Rob Pardo specifically) you can design your own map and SELL it.

Blizzard wants to foster the best mod community in existence, and to that ends they’ve unveiled plans to single out premium custom-created maps for sales on a StarCraft 2 marketplace. Maps will be split into two categories – normal and premium – with the former free and the latter for sale, with a portion of the proceeds going to the map’s creators. Blizzard hopes this will lead to more choice for StarCraft 2 players, and more innovative and creative custom maps fueled by the potential financial rewards.

I guess Blizzcon is a bit shy on Starcraft news, Diablo 3 got a new class – the Monk!