Wanted: Search Twitter geographically for kewords and auto tweets them...

I found a marketing service offering something I haven't seen (not that I really look for twitter marketing info ) that has be somewhat easy to do or a script exist for that claims

It Scours Twitter For You 24 Hours A Day, 7 Days A Week? Finding Prospective Customers In Your Geographic Area Posting To Twitter About Your Keywords? Then Automatically Contacts Them With An Offer To Come Into Your Practice? All On Total Autopilot & Set Up Once In Less Than 5 Minutes!

Click to expand...

Anyone know what such a thing is called? I might actually be able to make money with twitter with a tool like this.