Personally, I'm happy to see this happen.
Gaddafi is a delusional despot who continues to use his armed forces against his own people, already killing and injuring thousands. He has threatened "no mercy" to people who oppose his forces in Benghazi and without intervention would likely have killed many more to retake Benghazi and crush the rebellion.
If there was ever a time to get involved militarily in a middle eastern country, for the sole purpose of preventing civilian casualties - I think it is now. Especially when the UN and Arab league has backed it and the people on the ground are begging for it.