Shaky video shows that Muammar Qaddafi was taken alive, but injured, and there are credible reports that one of his sons died with him.
Reuters has the best report from the ground I've seen on Muammar Qaddafi's capture this morning. The reporters on the scene say it seems likely that NATO forces hit a convoy of about 15 vehicles fleeing Sirte to the west, that Qaddafi and the survivors took refuge in a drainpipe off the highway, and that rebel fighters induced them to surrender after a brief firefight.
Sirte, the last regime holdout and Qaddafi's hometown, was finally falling to the uprising at the time Qaddafi fled.
Rebel fighters on the scene told Reuters that Qaddafi was already wounded -- one said he'd been shot in the back and the leg -- at the time they took him into custody. They took him back towards Sirte, where the footage was apparently shot. It shows Qaddafi -- clearly alive, but shaken and wounded -- surrounded by triumphant rebels. The drainpipe detail, given that Qaddafi frequently referred to Libya's rebels as "rats" and other vermin, has been widely noted by many in Libya.