Although there are all sorts of thermometers built for grill use, I have yet to find one suitable for a rotisserie. What I have in mind is a wireless probe that can be inserted into a rotating roast or bird and that can a) withstand 500-degree heat and b) transmit a temperature signal through the covered grill to a remote receiver. Anyone here care to invent one?

Interesting dilemma/idea Nautico!  I assume something like this wouldn't work, as the transmitter unit appears to be quite bulky (and I don't think it would withstand the heat.)  Will have to keep my eyes peeled.