I'm in the Roboscope Yahoo group - more by accident than anything else - and usually quickly scan through, but was struck by a guy with an idea to buy a used industrial robot and fit it up as a mount to track satellites.
He's looking at this one:-
http://www.robots.com/panasonic.php?robot=aw-005a
Apparently a couple of hundred dollars will get one. Wonder if you need three phase power!
Crazy or revolutionary?
I have seen a video once of a top end mount that was slewing at amazing speeds! Much faster than this GM2000 (which apparently can track satellites):-
http://www.youtube.com/watch?v=N6GvuO_9tLY
No, I'm not going to do this, but found it interesting.