With both Sony and Nintendo releasing sales numbers or at least percentages for the week of Black Friday, Microsoft has decided to follow suit. The company announced today it sold 310,000 Xbox 360 units last week, nearly matching the Wii's 350,000 units.

It's been inarguably difficult to find the Wii in stores since its launch, and last week was no exception. While Xbox 360 console packages have been abundantly available at retail for some time, Microsoft's Aaron Greenberg told Next-Gen that retailers reported selling out of Xbox 360 units last week as well.

"We're seeing thousands and thousands of top big box retail stores reporting outages depending on SKUs, and some reporting outages of the whole Xbox 360 line," he told the site. Greenberg went on to claim that Xbox 360 sales trumped PlayStation 3 sales 2-to-1, which Sony has apparently disputed, but still hasn't released hard numbers to contradict the claim.

Nintendo execs have claimed repeatedly this week that they underestimated demand for the Wii. It's likely additional supplies of the high-demand console would've pushed Wii sales markedly higher than that of the Xbox 360.