Hm. This makes me wonder how Microsoft will handle the 360's next price cut. Given these sales and Gears of War 3 coming in just a few months, it doesn't look like the 360 will need a cut in the US anytime soon. Actually, it seems like that'd just cost them money at this point.
On the other hand, they could probably use a price cut in Europe, but they've already cut price in PAL territories more than they have in North America, unlike Sony/Nintendo who have done simultaneous cuts worldwide. Cutting the price yet again in Europe while keeping the price the same in North America is probably not something they'd like to do.