I'm a big fan of Halo, and being Canadian, I should point you to the explanation of the differences in Halo 2: Canadian Edition (thanks Bruce).
Seriously though, I'm really anticipating the release of Halo 2. I'm not sure why--I don't even own an XBox. I'm not going to buy one for a single game, although I think Microsoft is hoping a lot of people will.
I better get to some user group meetings in the hopes of wining one. BTW, if you live in the Toronto area, don't go to the Toronto Visual Basic User Group meeting (oh well, it was worth a try).