[thelist] Search Engine - Zip codes/postal codes

[kent]

We've all seen web applications that ask the user to enter their zip/postal 
codes and then return a set of location based results - a list based upon 
nearest geographically proximity. I would like to incorporate just this kind 
of functionality into a site. SOooo, anybody here have an idea about how to 
go about doing this - tutorials, freeware apps, or the like? 

Thanks in advance, 

Kent Rygiel
http://www.kentrygiel.com