4. Are people actually interested in pursuing this formally? If a spec was written would you change your DNS names to conform?

I belong in the group of people that need to change domain names for router interfaces, (and we have already been flamed, thankyou), so that's why I brought up the issue on how to name interfaces, so when chaninging, we don't do something else that is viewed wrong.

Would you be willing to set up a formal registration process with the IANA for 2(or 3) letter pop codes to be consistant?

Hello mr US centric.. Airports are three or four letters and they are not globally unique. --Peter