There is a new "Wired Networking with 802.1X Authentication" Web page at http://www.microsoft.com/technet/network/wired/default.mspx that provides links to Microsoft resources for understanding and deploying 802.1X authentication for wired networks with Windows-based clients.

There is also a new "Wired LAN Support in Windows: Frequently Asked Questions" article at http://www.microsoft.com/technet/network/wired/wiredfaq.mspx.