Well, we have clearly made an impression.
I think we now have around 3 different DSL router manufacturers finally getting some clue and ask *us* to test their latest IPv6 offerings.
Most seem to be going for new kit to do it, and typically starting with the more up-market WiFi models rather than entry level single port Ethernet models.
My staff have a directive to test everything they can - we are after a cheap, (give-away price), single port DSL router with a good DSL level chipset that will do IPv6 native over PPP (as well as IPv4 non-NAT and NAT) and offer sensible fire-walling options to the end user.
We are also after really cheap modems that will with PPPoA/PPPoE bridge or PPPoE/PPPoE bridge with 1508 byte frames (1500 IP over PPP) and just work, including annex M ADSL2+.
We are happy to look at changes on the LNS end to work with such kit, but to be honest DHCPv6 looks so much the wrong protocol for the job I am tempted to try and write an RFC on this. It should be PPP for prefix delegation, IMHO.