I finished my animatronic tail this morning, just in time for Halloween! It uses the Wolftronix design and servo controller (wolftronix.com), so have a look over there if you're interested in one of your own.

There's an index of construction pictures here: http://jaguartracks.net/gallery/mai.....2_itemId=33469

UPDATE: And a short little video showing basic movement here: http://www.youtube.com/watch?v=k2wq6MIWjBc
UPDATE (2): And a little bit better video here: http://www.youtube.com/watch?v=PccwtfVtqgY