[thelist] Best Practices for building a zip/postal code based dealer locator

[Bryce]

I have been tasked with coming up with posible solutions for building a
dealer locator that is to be searched by postal code.

Can anyone who has built something like this share your experience on the
best practices on how to go about building this and pitfalls to watch out
for would also be greatly appreciated. If anyone has any boxed solutions
they can recommend that would also be great.

Thanks
bryce