Sucker Punch has opened up sign-ups for the inFamous 2 user-generated content beta. Click here to get your name into the running if you are a resident of the United States.
You'll have until next Monday to do so; beta vouchers will be sent out in phases starting in early April. When the headlines about user content in this game first popped up, I wasn't entirely sold on the concept. But, as Nick will tell you, the implementation and tools provided make it sound rather neat.
According to Sucker Punch, non-US residents will be able to get into the beta via a separate process.
inFAMOUS 2 Limited Release Beta: Mission Designers Wanted [PlayStation Blog]