It seems Gearbox have released a demo of their recent World War 2 shooter, Brothers in Arms: Road to Hill 30. The 375mb download contains a tutorial and 2 missions can be had at most of the usual places, a few of which follow.

Fileshack, 3dGamers and Worthplaying

I always recommend you try demo's before you buy, it annoys me a little when the demo gets released so much later than the game.