I'm... cautiously optimistic. Maybe it's because there's been so much bad news lately.
Part of the reason this took so long was it had to be made clear that the US, France and Britain couldn't just magically throw up a no fly zone and knock planes out of the sky and hope that would be the end of it. Gaddafi does not have numerical superiority - he has the heavy weapons. With the resolution essentially giving open license to destroy these assets, if the rebels really do have it together (their leader had a long talk with Clinton in France, apparently), then this could turn out well, if humanitarian aid comes shortly after.
I get the feeling that this is basically a sort of leap of faith kind of action. I can't profess to be comfortable with that, but I can't say I'm comfortable sitting by while someone goes pounding innocent civilians, either.