Anthony on 7/12/11 you asked about the Realtek 8188/8192 .  I've seen a few
raspi bundles that have the EDIMax  EW-7811Un with them.  This is a  0x7392
: 0x7811 implementation of a RealTek RTL8188CUS  which worked out of the
box for me with the raspian and stratux images. I easily found a data sheet
for this device on line but it is marked confidential.   I know it's gauche
suggest referencing linux drivers.  However they happen to be here:

Realtek
http://bit.ly/1gMGkGo

EDIMax
http://bit.ly/1Mh4hWo

and contain PDF's themselves that may maybe helpful.

Ian