Good for some things, bad for others
A full moon might be helpful for night paratrooper operations. When I was a paratrooper, I made several night jumps. Jumping with no moon was tough because I couldn't see the ground. No fun at all. Once on the ground, our night vision equipment means that the darker the sky, the better. A full moon can also make it easier to detect and possibly shoot down stealth aircraft like what happened in Yugoslavia.
In the end, news reports indicate Bush will give Saddam 72 hours to flee or face military action. That being the case, the attacks will likely begin on Thursday.