AVR-Chat

I have a project for which I am going to need at lreast 8.9 Mbps of 
reliable wireless dta bandwidth.   The RF choices appear to be:

a) a cardbus (PCMCIA) 802.11g wireless ethernet NIC, or
b) a wireless USB solution

  Since I canot seem to locate a vendor who sells AT76C712 chips (the 
USB AVR), and Atmel will not even discuss samples of this chip, I am 
loathe to go in the USB direction.

  So, this leaves me with cardbus.  How tricky is cardbus to interface 
to?  Is it a parallel or a serial interface?  There are a LOT of pins in 
the connector, but how many of those are actually neccesary to operation?

  This project is the first embedded project I have done recently which 
I will not be able to use AVRs in .   )-:

  I am using 4 C8051F206 chips from Silicon Labs, because they offer 32 
channels of 12 bit, 100 KSPS ADC (this project requires 128 channels of 
12 bit ADC).   Sinve it is beginning to look as if the AT76C712 isn't 
going to be available, I am also looking at a C8051F130 as my 
"concentrator" and wireless network interface controller (20 MIPS just 
isn;t fast enough for this job, and whill 100 MIPS is a bit of oberkill, 
it beats being tto slow by several MIPS).

  The package will be battery operated, body worn.  It will output 2000 
conversions/channel/.sec via the RF link.

  All assuming I can interface to the cardbus WiFi card, that is.   Any 
advice?

tom