You may also want to look at geospacial data providers like mapquest and
navtech.  I was involved in a proximity ad project that required similar

"Gilrain" <[EMAIL PROTECTED]> wrote in message
> Hi folks,
> I'm building a PHP/MySQL database for a customer. It's an advanced mailing
> list for a band. They want to be able to send e-mails targetted to people
> around where a gig takes place. For instance, if a concert is taking place
> somewhere in the 42071 zipcode, they want to e-mail everyone within 500
> miles of 42071. The database will have around 10,000 members, with e-mail
> and mailing addresses.
> Does anyone have a good idea for this?
> Thanks a ton,
> John Thile (gilrain)

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