I am also (sometimes, in my free time... otherwise i'm just using it :) working on a driver for the HP Cascade family of ethernet cards, based on work started by Joerg Wunsch (joerg@FreeBSD.ORG). Those are the ones used on HP's token-ring like version of 100 Mbit/s ethernet called 100VG-AnyLan, where the `normal' 100TX cards that everyone else now uses don't work. (the Cascade cards also do `regular' 10 Mbit/s ethernet, and some of them are in fact 10 Mbit/s only.) If you want to know more, look at the entry in the BSD Driver Database. Or mail me if you would like to help.