This is hilarious. Half of you are saying that I have to buy Campagnolo cables, and the other half are saying that there exist derailleur cables that have both Campy and Shimano ends.

Half of you are talking out of your asses. It discredits this message board to answer a question when you don't know the correct answer. If you aren't sure, you really should hold your tongue, or at least qualify it by saying "I am not sure about this".

I still don't know who's correct, but to those who are correct, thanks!

UPDATE: I just got an email from universalcycles saying that the derailleur cableset I linked to above does in fact have both Shimano and Campagnolo ends. I suppose it's possible that they, too, could be talking out of their asses, but somehow I doubt it.