Could some means be added to allow different address formats in different locales?

I've done a brief search on the web and found FRANK'S COMPULSIVE GUIDE TO POSTAL ADDRESSES which lists many different address formats [1].  There may well be other or better guides.

For Australia we would need three letter codes for states and a single part 4 digit post code instead of a two part zip code.

Michael.

[1] http://www.columbia.edu/kermit/postal.html#general
and scroll down to "The City Line"