Here's an interesting little interview with Sol Sender, who turns out to be the guy who designed the Obama campaign's famous 'O' logo:
Q: How many iterations did you go through before deciding on this "O"? Was it your first idea?
A: We actually presented seven or eight options in the first round, and the one that was ultimately chosen was among these. In terms of our internal process, though, I believe the logo — as we now know it — came out of a second round of design explorations. At any rate, it happened quite quickly, all things considered. The entire undertaking took less than two weeks.
A good day's work, I'd say. I reckon we'll be seeing spinoffs of this for years to come in the states.