Australia Post Codes with Longitude and Latitude + PHP functions to calculate distance between them

http://www.corra.com.au/support/downloads/

# Australian Postcodes CSV File – Zip (292kb)
# Australian Postcodes MySQL Dump File – Gz (286kb)
# Australian Postcodes PHP Functions – Zip (2kb)
# Australian Postcodes PHP Functions – Plain Text (3kb)
# Australian Postcodes MySQL Function – Plain Text (1kb)