LittleBigPlanet came out last year, and while it was fun, didn't immediately sell as many units as its advertising and profile would have suggested. But that's OK. Because it's a slow burner. As witnessed by its impending 2009 re-release.
The LittleBigPlanet "Game of the Year" edition will see the original game packaged alongside "much" of the downloadable content that's been released in the months since the game first went on sale.
No idea just which DLC that would entail, but so long as it's got the 2000AD and Team ICO stuff in it, that's a good deal.