Ok, I followed TID #10078616, and I have radius working on a netware box.
I've tested it using the NTRadPing utility and it works fine.

When I try to authenticate using the built-in 802.1x support in XP, it's
sending the username in HOSTNAME\username format, which the radius server
doesn't like and gives a -610 error because of the \ character.

I found a cool solution that describes how to configure Freeradius on SLES
(http://www.novell.com/coolsolutions/feature/17044.html), and it explains
this problem and how to add lines to the config file to rewrite the
username to drop the HOSTNAME\ portion. My question is how to do this
with the novell radius that comes with NMAS.... surely I'm not the only
one with this problem.