PNA 2.0 and USB

Hi all,
I'm looking for linux drivers for a HPNA 2.0 USB networking device. I
know that there are the Linksys beta drivers available for PNA 2.0 PCI
cards, and I have used them in the past w/ sucess. I have a Compaq
Ipaq PNA 2.0 USB device and I can't get it to work under linux (I'm
currently using mandrake 9.1). (I tried the Pegasus driver and it
didn't work.). The USB device seems to be based on a chip called
BCM42U, which I'm guessing is related to the BCM42xx chips that the
PCI PNA 2.0 cards (for which there are drivers available) are based
on. Does anyone know of any drivers , or if there's any way to modify
the PCI drivers to get them to work on the USB device ?
Thanks.