Jumped onto what used to be the 6bone the other day.  I even set up the IPv6 route prefixes on my FreeBSD router, but it looks like route advertisements and router solicitations aren't working properly (probably because of my firewall).  My understanding is that IPv6 also relies a lot on multicast, so I'm going to see if I can get the right multicast routes set up such that at least DNS and NTP work on the clients without having to set anything up in DHCP/DHCPv6.

Fortunately, pf already supports IPv6 side-by-side with IPv4, so I won't have to tear up my new firewall policy just for experimentation's sake.

UPDATE: rtadvd wasn't running on the correct set of network interfaces, hence router solicitation wasn't working.  After restarting rtadvd and running "netsh interface ipv6 renew" (view the address assignments with "netsh interface ipv6 show address"), I can finally see the dancing KAME!