After you have uncovered a piece of Helghast intel in Killzone 2's single player campaign, you will be able to visit Killzone.com and claim a special reward.
These unlockable rewards come in various shapes and sizes – some are simply printable versions of the propaganda posters you see in-game, others contain details on the wildlife of the Maelstra Barrens or pages from a Helghast soldier’s secret journal.
Victor Zuylen, Killzone Community Editor, stated "If you’re good enough, you can even unlock and download physical objects from the Killzone universe."
That statement threw us for a loop until he provided an example of what he termed "papercraft," or a paperr models (example below).
It'll be interesting to see if they also allow in-game items and unlockables...