It's great that, if it is actually him who has been captured (I've heard it's still to be confirmed for definite), as it's a symbol of the people overthrowing a dictator. I don't agree on imposing beliefs and ideals upon nations, but the people of Libya chose to remove this power hungry lunatic with force - we, as western nations, may have helped, but we did so out of a common cause for democracy, and the people of Libya demanded democracy.
I'm not condoning that we invade countries purely because they should be democratic, or that we view them as barbaric - I don't like cultural imperialism. But I am certainly for the removal of dictators when their people want rid of them.