PW Forum / Finding location info on companies for mashup

What information do you have on the retailers?

If I wanted to massively harvest a bunch of information I would build a bot in perl.

Otherwise you might be able to find a list of retailers through industry websites.

Have you tried e-mailing the company?

I had performed this duty for several corporations in my past, but the data is now quite old, 2001 vintage, and the data was specific to retail lessors in one case and pizza chains in another.
The advice above is valid, though I know that at least the companies I have worked for were very stingy with any proprietary information.
Athough today's store locators are more locked down than they used to be, you could sometimes "fool" them into giving up the entire database, or at least one state at a time (a reasonable task) by playing with the database query settings (the stuff after the ? marks) in the URL address box in your browser.  Pay attention to any number that specifies a limit on how many records are returned.  Also try some wildcards, variously * or % to encourage a data dump to your browser.  Again good luck and successful data mining to you!