I've always loved Axis & Allies. I have the original board game, and had the old computer version. However I can't get it or the new game to run on my mac windows emulator. Not sure if the link Daer posted would work.
Game Table Online
also has the game, but I've only ever been able to load it, not play it.
I've never played the Europe or Pacific theater versions, and I understand there is a 1942 version out as well. Anyone play them?
The drinking game
is always fun to play with it too. Makes the last few moves very interesting.