Two million levels for Sackboy

Sony has announced that Little Big Planet now has had two million fan made levels uploaded and that the pace isn't slowing down - it's actually going up. How many of those levels are actually playable and not only constructed of a few blocks and some pits, they are not telling.

Still, Little Big Planet is an awesome game and it's nice to see that it's still getting some fan love. Will it break three million levels at some point in the future?