Nice idea. However, staring on the emptiness of a map when you enter, is not such a good idea though. Suggestions:<p><pre><code>   - use geolocation to get visitors id and show a map that 
     is  closer to his area.
   - if there are no ads in that region town etc, show a prompt or 
     two to entice the visitor to do something. Use some mock-ads in
     the side margins rather than just *place an ad to promote your 
     location or service to your local customers*
</code></pre>
Can you post a sample of an area where their 100's of ads to see how would that appeal visually?