eBay is ready to begin auctioning advertising airtime on 2,300 participating U.S. radio stations. The venture –which puts eBay into competition with Google– includes both conventional terrestrial radio and Internet radio advertising. Stations in all of the 300 top-ranked radio markets are covered. Advertising inventory includes primetime spots with 90 percent in morning drive, midday or evening commute hours from Monday through Friday.

How (if at all) will this impact companies like ours that barter our services for radio station commercials? When you finish the quiz, close your Blue Book and raise your hand.