Gamasutra has details from Gamelab 2011 in Barcelona, Spain on how Mojang's upcoming Scrolls will have a staggered rollout similar to the way Minecraft is creeping out bit-by-bit:

"With our new game, Scrolls, we'll follow the same formula as Minecraft," said Kaplan. "That means we'll release the game very early," at the minimal playable state.

He said this means something different for every game, of course, but people will be able to pay for it, play it, and give feedback from a very early stage. This also means frequent updates, he said, which need to be properly communicated to players, because community involvement is one of the most important elements of Minecraft.