There are plenty of nice demos to try out with this week's PSN Update. For PS3 owners, the second Ratchet and Clank demo is available, with players taking control of the lombax with a weapon fetish. Also, there's the demo for the big girl inside of us all, as Fat Princess stuffs herself into a smaller size offering. Meanwhile, on PSP, the happiest blobs in this LocoRoco: Midnight Carnival world, along with the very angry Jak and Daxter, offer up demos. Check out the full PSN update after the break. Choose your platform to view the corresponding release list: (Note: Continue past the break to view both release lists.)