Biotic MEMS. Okay, if that's not already a sexy idea, it ought to be

Microorganisms act as tiny machines in future MEMS devices from PhysOrg.com
The single-celled Spirostomum is a tiny brown worm that can contract its 500-micrometer-long body to 25% of its length in a millisecond, making this protozoan the fastest-contracting microorganism known. Scientists think of microorganisms like this as tiny functional machines. After all, many of them have capabilities far surpassing the current state-of-the-art in MEMS (Microelectromechanical Systems) technology.

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