Sniper Elite V2 the wait's over. The demo has appeared on Steam, weighing in at about 2 gigs, and should give you a good idea of what to expect when the game drops on May 1.
PC users may have gotten the demo late, but they're getting rewarded with an exclusive 6v6 team deathmatch mode, along with all of the game's other options.
Steam also says pre-orders will get two special weapons, the SVT-40 and the Karabiner, presumably alongside the bonus mission adjective to, you know, kill Hitler. That guy's still hanging around?