So there's a group of folks down at Georgia Tech making rat-brain cyborgs. Here's how:

In Dr. Potter's hybrid system, the layer of rat neurons is grown over an array of electrodes that pick up the neurons' electrical activity. A computer analyzes the activity of the several thousand brain cells in real time to detect spikes produced by neurons firing near an electrode.

And the resultant control system is apparently compatible with a Khepera bot (a reasonably inexpensive, commercially-available robot design used often in robotics research).

They've apparently been working on the "Hybrot", which apparently has little life-support systems for the neurons built in, since '93.

It's a crazy world.