I copped the Collector's Edition from GameStop today. I didn't really want the entire package (tin case, 8'5" Ezio statue, art book, making of DVD), but I did want the in game stuff (two maps, available only through GameStop supposedly), so I caved and got it cuz they had an extra one. Dude also gave me some codes..one for MW2 gamerpics on 360, the pre-order content for Dragon Age: Origins, and a coupon for a $5 lunch sandwich at TGIF that was part of a MW2 promo.
I'm not actually getting it 'til Christmas, but it's getting good reviews and I liked the first, so I can't wait to play it.