Blizzard is also releasing a commemorative desktop wallpaper with the Protoss Zealot, Terran Marine and Zerg Hydralisk; you can see it above, and download the appropriate size for your desktop here.

But the community seems convinced that Starcraft II isn't balanced yet, in particular, there's a sense that the Zerg are underpowered ... on your choice of desktop wallpaper Assassin's Creed ...