A client asked me to create a database containing his clients profiles and a way for users to search for the closest client profile within a particular category by supplying a mile radius. Once directed to the appropriate profile, I was hoping to use the google maps API allowing them to enter their address and get driving directions if needed.

Are there any available scripts out there that will search a database of addresses and return the closest match?

Also, is there an easy way of maybe redirecting the results of the driving directions to maps.google.com?