Wireless USB Modem

Hi,

I wish to connect a Wireless USB modem to a Gumstix Verdex Xl6p.
I have looked at the Sierra Aircard 595U and it supports the download and upload speeds I require.
The Gumstix Kernel also contains drivers for this device but my concern is the Sierra Device Spec identifies USB 2.0 as being required and the Gumstix is USB 1.1 Full Speed.
Does anyone know if this device will work with the Sierra drivers on a Gumstix Xl6p and has anyone had experience with any Wireless usb modems on the gumstix

Any help will be greatly appreciated.

Cheers,
Gary