I'm scrambling to head out of town for about a month so I'm not sure I'll be able to help you all the way through this. Can you verify your drives are online? If you do a 'dmesg | more' from the command line, look through there carefully and you should see them if they're being detected. If they are, you might need to do a zpool import first, then a zpool export (from the command line), and then finally an Auto Import from the GUI. If they're not, well, you probably have a bad controller, or some other hardware issue.