According to MSNBC Skyrim has shipped more than 10 million copies of the game so far and has earned over $650 million (yep over a half billion dollars.)
And it is the fastest and best Steam selling game in history, selling, already, more than three times any PC game on the Steam site this year:
http://video.msnbc.msn.com/in-game/45701325/#45701325
ETA:
I believe this means PCs should get more attention, like being able to map keys to the keypad for us south paws, among other things.
The MSNBC info is BS, it can't have earned $650 million. If every copy of those 10 million shipped was already sold, and sold for an average of $60, it still would only have earned $600 million. But those 10 million shipped are not all sold, and a lot of the copies were sold for a lot less than $60, enough that the limited number of collector's editions sold could in no way balance it out to make there be an average selling price of $60. The MSNBC clip also says that Skyrim has sold 3 times as many copies as any PC game this year... which is also obviously BS (Battlefield 3, MW3 - both have sold significantly more than Skyrim). Even if every last one of Skyrim's copies sold this year were all sold on the PC, that still wouldn't be true. That clip is simply poor journalism.
One mistake people commonly make in guessing how much a game has made from sales is to multiply the supposed number of copies sold by the North American MSRP. This misses the fact that the game isn't priced the same all the world over, and many copies are sold well beneath the NA MSRP, even within North America. But this MSNBC report makes additional mistakes beyond that one, by mistakenly thinking that copies shipped = copies sold, and by being ignorant of PC game sales this year, including Skyrim's which can be calculated by subtracting the public sales numbers for the 360 and PS3 versions from Bethesda's total claimed sales. Someone's living on another planet to think that Skyrim has sold 3x more than any other PC game this year. It's not even the first or second best selling PC game of the year.