cobberhead ...... If only the mobo was toasted , and you replace it with exactly the same as is (was) installed , then you should just be able to put it in , reconnect all the periphials ....and everything should be good. Just to be on the safe side, I would be slaving the hd on another machine and make copies of whatever you dont want to lose.......
It might be a good idea to test the ram as well, just to be sure it wasn't affected by the storm.
dl65