[Raven]

That sounds fairly impossible to me. iPods, particularly a Nano, would have to work pretty damn hard to generate the kind of current necessary to fry a mobo. I can't really tell you any more than that without more specifics, though. What kind of computer were these two fried ones? How old? How did the IT guy decide that the mobo was fried? (Did he just say 'whoop, won't boot, motherboard must be dead?' or was he specific? Did he check anything while you were watching?
(Also, perhaps, in the future, you should confine each topic to one thread? Posting the same thing twice seven minutes apart will not get you a faster response.)