Found this article, Pretty interesting stuff. As long as they can make it cheap enough I don't see why they couldn't use this to completely replace copper in all wiring systems even computers. Although personally I would love to see diamond based circuits since they transfer heat almost instantaneously, but I doubt they will get those down to a cheap enough level manufacturing wise.
http://www.media.rice.edu/media/NewsBot.asp?MODE=VIEW&ID=16123&SnID=857839210
http://www.media.rice.edu/media/NewsBot.asp?MODE=VIEW&ID=16123&SnID=857839210