Some new Crysis Warhead screens (along with bigger versions of some old ones) have been released, courtesy of Japanese site 4Gamer. We know they're for Warhead, and not the same-island-same-bad-guys Crysis, because Crytek were good enough to stick Psycho's (the expansion's protagonist) in half of them just to be sure of it. Particularly #s 5 & 6, which should make for a great "spot the difference" print-out for your next children's birthday party.
[Thanks Chris!]