Just following the release of Minecraft 1.1, creator Markus Persson (AKA Notch) reported on Twitter that registered users for the world-building game-thing just passed the 20 million mark. That's an impressive stat for the indie project, which has been rapidly growing in popularity since its alpha release back in May of 2009 (the full release of the title took place in November of last year).

Notch joked in the tweet that if every user weighed 70kg (about 155 pounds), the total weight would equal 25 percent of the Great Pyramid in Giza. We can only assume that that set off a rash of Great Pyramid building projects in the game, of course.