added some more info/details.
hardware:
add Netgear FA-311 cards (sip)
added newly supported models
added that NVIDIA now has some supported cards
moved on-board audio to supported, but untested
added usb and pci audio as supported
prep:
added a "Preparing yourself" section describing how to best prepare
oneself for the adventure ahead
some rewording of the 'how to get to open firmware' sections to make some
details more clear
938925db3b