iPAQ and USB cryptographic tokens?

We'd like to use USB-connected cryptographic smart tokens with things
like the iPAQ or the Sharp Zaurus. From a brief study of the USB spec,
it looks as if one could easily hack a cable to connect the handheld
to a female "A" connector into which a token could be plugged. The
question is whether the USB driver software under Linux would know
what to do. Has anybody tried this? Is there any hope?

Paul Allen

-- 
Boeing Phantom Works                   \ Paul L. Allen, (425) 865-3297
Math & Computing Technology              \ paul.l.allen_at_boeing.com
POB 3707 M/S 7L-40, Seattle, WA 98124-2207 \ Prototype Systems Group