Sony releasing KillZone 2 demo?

Is Sony releasing KillZone 2 demo on PSN... Or if you preorder the game, you get will get the demo from gamestop or on the PSN?

Also, is there going to be collector edition for KillZone 2?

If theirs 1 problem i have with Sony then it is the amount of demos. We dont get enough. Im thankfull for the great demos but their arent enough. But i bet the killzone demo will come out. Just that the people who pre-order get it earlier.burstlimit514

finally we europeans getting something..........

Can u create another account, i heard that sony restriced ur IP to one account.

That would be awesome.