A new TechNet article titled "Using Windows Tools to Obtain IPv6 Configuration Information" has been published at http://www.microsoft.com/technet/itsolutions/network/ipv6/ipv6config.mspx.
This article describes how you can use command-line tools to obtain IPv6 configuration details for a computer running Microsoft Windows XP with Service Pack 2 (SP2), Windows Server™ 2003, Windows Vista™ (now in beta testing), or Windows Server Code Name "Longhorn" (now in beta testing).
For additional information about IPv6 in Windows, see http://www.microsoft.com/technet/itsolutions/network/ipv6/default.mspx.