Sony announced LittleBigPlanet Hub today, a free-to-play version of the creation-platforming game coming to PlayStation 3 later this year.
Hub offers the the first worlds from both LBP and LBP2, and a brand new exclusive level to play through. However, the meat of the experience is through creation. The entire "Create" mode of the original game, with players being able to buy additional content through the PlayStation Store. Given the amount of DLC available for LBP, it's not too surprising to see how a F2P version would work.