SCEA has started sending out invites for a Dead Nation Beta, which is the PSN-exclusive being worked on by Super Stardust HD devs Housemarque.
According to the invite, per Joystiq: “All you need to do is make sure you are signed in to the PSN while trying to kill as many dirt-ridden flesh sacks as possible!”
Killing a bunch of “dirt-ridden flesh sacks” sounds like a lot of fun when you put it like that.
The Beta is scheduled to end on September 3, and the invites were sent out at random it seems, so check your e-mail to see if you received one.
Dead Nation is slated for a fall release.