Lee Brimelow does a nice job describing some of the exciting new features of the Flash CS4 IDE. He has published a video on his popular GotoAndLearn website.
Some of my favorite features, and I am sure for most of us, are:
Flash CS4 is definitely a must-have for full time Flash developers. Even if you are a part-time Flash-er, like me ;-) you should convince your boss to get you a copy!
Now where is that Flash –> Xaml converter ?