Anything that is related to Minecraft or Terraria reminds you of King Arthur.. Nice stuff tho, interesting! :D EDIT: Its actually more profound than just Minecraft.
Someone else has just made news by making a pack of Minecraft skins. Only 15.:) http://www.joystiq.com/2010/10/22/pixel-artist-releases-free-pack-of-gaming-related-minecraft-char/
Probably because its hard to monetize a minecraft clone, I mean minecraft doesnt have obvious in app purchases its just a good game, all these other ios/facebook social games do.