I was planning to write something about the whole AP v. Shepherd Fairey thing but Sarah got there first.
I'm more militantly anti-AP: I think regardless of the legal merits of their argument, they're clearly being copyright bullies, including their cropping of the original photo for maximum damage and the fact that they've been sending out biased stories w/ very biased headlines as "news" to all their clients all day long. But, again, just because they're acting badly doesn't mean they don't have a case.