Yes, I believe MD5 uses skeletal animation.
It's the animation I'm interested in, since I'm trying to find an animated humanoid models. Most of the ones I've found are suitable for testing, but little else beyond that.
The code I've been porting seems to contain a basic skeletal animation. But as I say, there are some bits I haven't been able to figure out how to convert to. MD5 seems to allow parts of the model to be dynamically swapped in and out, removing the 'gun problem' from MD5s, which seem to be quite easy to find.
MD3 leaves me with the same problem of how to import it.
It's just so hard to find good animated MD2 models!