Glad you liked the beginner's tutorial :)
Unfortunately there aren't any import options for animations yet - you can only import frames as individual image files one at a time. The animations feature is relatively new so we haven't got round to advanced import features.
If you can export your SWF animation as a series of PNGs you could import them - but if you have many frames it could make the download size very large, so I wouldn't recommend it. If your SWF animation is made by moving different objects around, it would be better to import each object as a Sprite and set up some events to move them around in the same way.