need help with australian post codes

[jeephp]

hey everyone,
I am looking for a way to find the closest location(s) to a postcode supplied by a user. I'm not just looking for the closest numerically - but the closest geographically. Specifically I am looking for a solution that works with Australian postcodes.

I have been searching online but not managed to find a database of postcode locations calculations- or a way of calculating distance between these - and was hoping that someone might have some experience in this area or pointers to where I should look for further information.

Thanks a lot!

[webmaster]

There is no good method for this, but you could do something with the ripe.net search:
http://www.ripe.net/fcgi-bin/whois?form_type=simple

The search isn't 100%, but for most people, it will probably be correct.