Just a few caveats I've noticed with this - 

 

It will apply the motions to only the first figure in the scene - a figure being anything with an armature - based on the order in the Scene List view. If you have multiple animated characters, split them into separate .duf files before exporting. Also, if you've deleted the main figure accidentally and undone it, it may not be the first thing in the scene list any more. There's no way to re-order the scene list I can find (please let me know if you know how to do it), but when you delete and undo, it always adds the undeleted object to the end of the list. 

You need to make sure your main figure is first, or you'll end up with animated hair or something.