According to a reliable source over at the Rlu-Ray.com forums, the beta version of LittleBigPlanet may be released as a demo prior to release of the game later this month. The beta is due to end on October 12th 2008 and and the full game won’t be available to buy until week commencing October 21st. This leaves plent of time to enjoy the demo before the full release. If you haven’t been able to get your hands on a beta key, luck may still be on your side to play the game before release.
Until an official announcement, this is currently considered as a rumor. Be sure to check back for what’s new on the PlayStation Store over the next couple of weeks in case this turns out to be true.