Enabled IPV6 on my router, with statless DHCP. My windows clients are not assigned an IPV6 address. The T3200M does acquire an IPV6 wan address.
It will work with statefull DHCP, but that is not how I would like my network configured.
Lame, turns out the router needs to be rebooted after any change to ipv6 configuration. so if you make a change to anything ipv6, dns, DHCP, etc. just reboot.