Another thing I really love about Moo.do is the ability to quickly shift perspective to focus on different levels of a project. With ⌘ + enter, I can quickly drill deep into a project to focus on a single item, and then with ⌘ + shift + enter I can just as easily climb up the project tree to see everything.
It's powerful without being overly complex. It's available on every device... and it has great keyboard shortcuts! Give Moo.do two days as your primary tool. You won't regret it.
More importantly, i love the about/press kit page - the guy using the phone "off the grid" with his hand fully stretched out is hysterical :)