I've already got a keyset for the Roomba, although I've been told that it isn't working. I've also gotten an e-mail from someone hoping to attach an N900 to a Lego RC car that uses IR; I've got documentation for it, but I'm still trying to determine whether I can legally use those docs to create a keyset in Pierogi. (Also, his project is much better suited for use with LIRC than with Pierogi.) But yeah, in theory, robots would work fine.

(But I would think most remotely-controllable robots these days would be using wi-fi or bluetooth for communications, wouldn't they?)