Nearly a quarter of display ads seen in the US are on Facebook

"Nearly one of every four graphical, online display ads viewed in the United States in the third quarter was on Facebook's website, according to a new report by Web analytics firm comScore.
Facebook's 23.1 percent share of display ad impressions was up sharply from 17.7 percent in the second quarter, and more than double that of the No. 2 ranked company, Yahoo Inc, which had 11 percent share.
In fact, Facebook's website racked-up more ad impressions in the third quarter than the next four companies combined, which includes Yahoo, Microsoft Corp, News Corporation's Fox Interactive Media and Google Inc, according to comScore."
Source:  comScore data, reported by Reuters, 8th November 2010