I'm not sure why the fascination in Japan about creating robots that look like humans. Maybe they're trying to create a slave population without guilt. Maybe it settles some deep-seated human emotional desire to be on top of the hierarchy -- this way nobody has to be at the bottom.
Anyway, this 13Meg video shows the latest motion control technology. It's uncannily real -- I thought at first they motion captured some guy doing it.
And just to settle your fears, I in no way intend to download their motion control algorithms into my nanobot army. And I would never think of using existing living cells as a template to create nanobots with either.
Come to think of it, I think I'll let the Japanese keep their cute-humanoid-robot-standing-up-from-a-fallen-position control algorithms because in a fight I don't think they'll stand a chance against my insect-like designs.