I was wondering if you had considered looking at a 4 in 6 tunnel support.  I know that it may seem backwards with a lot of things moving to native v6 but the 44 net is a great resource for hams.  One example of why I can see needing this is a lot of providers, specifically wireless, are doing a double or triple NAT of their own ipv4 address space.  While this is OK for most internet activities it is not good to support inbound connections.  You do however get a native IPV6 address that is not nated and fully routable. Having a headend location to support a 4 in 6 tunnel would help a lot of folks.  I do support large networks as part of my day job and would be willing to help set up and support if you wanted to take this on.

Thanks,

Scott