I've had my Rev. B 15" Albook for about 8 months ago, and aside from some minor warping I've had no problems with it. Then suddenly today at work, for no reason at all, my menubar Bluetooth icon suddently grays out. When I clicked on it, all I got was "Bluetooth: Not Available." I've restarted my computer, run Disk Utility and still no Bluetooth. Kind of important since I need to sync my calendar and address book to my phone almost every day. Any ideas?