I currently have a working 802.1x (Wired) implementation using XP clients and Windows Server 2008 as the Network Policy Server (IAS basically).
I'm trying to get some Windows 2000 Professional clients to 802.1x authenticate, but they simply don't. They are no logs on the NPS server.
The Windows 2000 Pro client has a computer and user certificate installed. I have also enabled the "Wireless Configuration" service and configured the "Authentication" tab for the NIC to enable 802.1x authentication (Smartcard or other certificate).