We picked up Arkham Horror yesterday and gave it a spin. The production values on this game are incredible, and the game was pretty fun as well. (Of course, I'm a sucker for Call of Cthulhu stuff.) Arkham Horror is a remake of a 20-year-old game that used a lot more luck and random movement, and the updated rules improve the game considerably, I think.
The best part of this game is that it is a cooperative style game; the players are working together to thwart the designs of the "ancient one" (Hastur, Cthulhu, Yog-Sothoth, Nyarlathotop, or another randomly-chosen Great Old One), and either they all lose, or they all win, must like in the Lord of the Rings game. This makes for a fun session, since there is a lot of community-strategizing on how to best approach a rather complex puzzle.
The game is a little pricey, but worth it in my opinion - it's fun.
Also, I want to play 1000 Blank White Cards.