A new contest is starting May first. Although it has not started yet, this is to just get you interested and sign up – this was posted on the official forums:
Little Big Planet Creator Tournament
From May 1 – May 31
Participants must create a Little Big Planet level based on a subject that will be revealed on May 1. You will have exactly a full month to complete and submit your level. After everyone’s levels are played by the moderator, a winner will be announced and the reward given. You are allowed to use Little Big Planet 1 or Little Big Planet 2, it’s your choice.
Unlimited Number of Participants may enter
Prize - 3 month Playstation Plus code and $15 Amazon
If anyone wants to enter, come to the Playstation Gamer League and sign up. And no, there are no entry fees.