Maybe Barack Obama is a celebrity after all: According to the AP , more than 38 million viewers tuned in to watch the Democratic nominee's DNC speech last night. Even excepting the uncounted audience who tuned in via C-SPAN, PBS, or online, "Nielsen Media Research said more people watched Obama speak than watched the Olympics opening ceremony in Beijing, the final American Idol or the Academy Awards this year." If next week's Republican National Convention has got its work cut out for it, John McCain might want to start with a VP pick who's got more ratings power than the lead from 30 Rock . [AP ]