Question:
Hey, it seems like it just might work.
http://youtube.com/watch?v=SKdmPYeehuU&mode=related&search=
Answer:
I'd be afraid of accidentally sitting down on the toilet having forgotten to take the cat's litterbox out.

Answer:
I always thought squatting on a toilet seat designed for a human would be an uncomfortable position for a kitty.
Good video, though!
My Sam would use the toilet if his litter box was too dirty. I didn't have to 'train' him, I just told him that it was my litterbox. That also got him to stop drinking out of the toilet.
cats leave pawprints on your heart