Not sure if anyone wants to wikify this but I put a document up on Mordor, complete with an ISO image of the kernel changes that were needed to get Plan 9 to detect the network device for the Parallels product on Mac OS X (may work with their Linux/Windows versions too)
http://www.tip9ug.jp/who/leimy/parallels.html I hope it's helpful. Thanks to lucho and jmk for working out the BIOS bits and testing this first. Dave
