Other things of note:
1) The 360 outsold the Wii's software total by over 1 million in the first week of this calculation. The next week, it sold very slightly more than the Wii's total software (within 100k units). The week after that, the 360 sold very slightly less than the Wii's total software (again, within 100k units). The week after that the gap widened in the Wii's favor, and the Wii hasn't looked back since. Expect the 360 to outsell Wii software again at key moments like the week of GTA IV. It's also possible this trend will simply reverse itself, although the fact that this happened during the holidays (when, again, a hugely disproportionate amount of software is sold) is more indicative than two months in the early year would be.
2) PS3 software is more than holding its own as well, with very strong sales in the EU counterbalancing slightly weaker attach rates in Japan and the US.
3) These totals are estimated down to the thousand, in case you hadn't noticed.
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