I assume this awesome bone stuff is really only feasible in platform and top down games?
I don't see why it wouldn't also work for isometric games as well if that's what you mean. It all depends on how you draw your character and what constraints you put on the bones. Bones are pretty much like a stick man really, and you can make a stick man look like he is facing whichever angle and direction you want depending on how you draw his parts (head mainly).
~Sol