As of today, the Minecraft Statistics page indicates that it has surpassed well over the 4 million copies sold mark. For a game that's not even out of Beta, that's pretty damn impressive. This news comes to us on the eve of MineCon, where we will finally see version 1.0, its first full release.
Despite this remarkable achievement, Creator Markus "Notch" Persson still remains wary and a little nervous, stating "That milestone also means people might start reviewing the game. There have been a few reviews already, but I have a feeling most people are waiting for the full release." adding "This makes me nervous. It does feel like the game has already proven itself. Lots of people play the game, and we receive a lot of friendly and positive emails from players. We’ve won several amazing awards, so several people in the industry seems to enjoy what we’ve done. Now it’s just the press left."