In addition to today's earlier LittleBigPlanet DLC announcement, Associate Producer Eric Fong has confirmed that it will continue to add to the LittleBigPlanet experience by bringing out new levels, costumes, materials and a variety of other content.

To quote:

GamePro: Will Media Molecule continue to release new levels?

Eric Fong: Yes, Media Molecule is continuing to add to the player experience with new levels, costumes, materials, and a host of other content.

How will you ensure that players find the best user-created levels?

There is a slew of metrics we monitor to help point players in the right direction, including how many people have "Hearted" a level and/or creator, how often a level is played, user comments, "tagging" etc. The cream will literally rise to the top as popular levels take up more real-estate in the game. More PlayStation 3 News...