Both DigiTimes & EETimes are reporting on the sales reported by market researcher Current Analysis. I dunno if it's the first time this has happened or not, but it's apparently big enough news for two of the biggest tech websites, so it's good enough for lil' old us ;)

"Directly contributing to AMD’s success was the rise in popularity of Media Center PCs. In September, Media Center PCs accounted for 46% of all US retail desktop sales. Of those sales, 55% included an AMD-based processor, Current Analysis said."