CooL! I use Macromedia Flash 8 Pro. It's not as YF as CS5, but it runs a lot faster when animating multiple characters. I'd love to see your animation when it's done! Will you post it one DA? (Also, do you plan to layer the mane or just shape tween? I ask cause I used the layering technique for that Twilight Sparkle one, but I have yet to try the shape tween and am kinda curious as to how it might turn out...) Good luck!
The Mane is built up of two parts. I intend to do several flicking motions within the symbol and then call upon them as they are necessary. The Doctor's mane doesn't move about too much, but for later models I may need a more elaborate mane design. I haven't touched Shape Tweens yet but I hear they are a bitch.