Super Meat Boy has told extremely well for a indie-made downloadable arcade game, according to a recent interview at Pocketful of Megabytes.
Team Meat has now sold about 600,000 copies of SMB. The interview revealed that 200,000 units have come from the Xbox Live Arcade version, while PC game sales have approached 400,000.
The PC version on Steam recently got a free upgrade that added Super Meat World, a portal that added new chapters and tons of new levels to the super-hard platformer.
A retail version of the PC game is due out later in April, and a Mac version is also planned.