Already released, but if you're looking for games to buy when you get the console, I'd highly recommend
IGN: Marvel: Ultimate Alliance Review.
As for new games:
IGN: Alan Wake Preview
Supposed to release in Europe in July, probably around that time in the US too.
edit: Jubee, I didn't experience any slowdowns, but I'm sure there'll be more optimization before release. Regarding ammo: after the first fight, run straight out of the building to pick up quite a lot of ammo.
