The US owes it to the people of Libya to join the NFZ.
Perhaps, but I doubt it'll be necessary. Some of the things coming out of France give me the impression that they're just waiting for Gaddafi to give them an excuse to blow his military to smithereens. Might because of allegations that Gaddafi contributed to Sarkozy's election campaign - Sarkozy could be attempting to prove that wrong by means of exploding Libyan aircraft and tanks

That said, it would certainly be a welcome change to see middle-eastern people cheering at American planes for a change, rather than shooting at them.
All that aside, the toughness of the resolution surprised me. This one's tough enough to actually make a real difference, and broad enough that Gaddafi has to be real careful of he gives everyone an excuse to take potshots at his military. Good to see the UN can, on occasion, do something right.
Too bad it still couldn't happen if the country in question was friendly with one of the permanent members. Insurmountable vetos make the UN far more ineffectual than it ought to be.