A new white paper titled "Cisco Network Admission Control and Microsoft Network Access Protection Interoperability Architecture" has been published at http://download.microsoft.com/download/d/0/8/d08df717-d752-4fa2-a77a-ab29f0b29266/NAC-NAP_Whitepaper.pdf.
This white paper describes the details of the interoperability architecture that allows customers to deploy both Cisco Network Admission Control (NAC) and Microsoft Network Access Protection (NAP).
For more information about NAP, see http://www.microsoft.com/nap.