If that is devising some sort of NAT for the large percentage of customers that don't care, then that may be the direction we need to take.

Doesn't NAT-PT do just this? If I'm an ISP with a million customers, if I can use NAT-PT along with a IPV4 block of say /13, that seems like a win. V4-mapped and V4-Compatible V6 addresses were created for this purpose, weren't they? Chuck