For more information about this demo, please go to the related blog post. In this demo, I used 1 PathGenerator which is bound to a webservice which provides driving directions (it results in the blue path). Secondly, I used 1 PushpinGenerator which generates pushpins for apartments (again, bound to the results of a webservice). Then I draw 1 pushpin at the center of the map. Lastly I bind a polygon to the boundaries of a given postal code.
Besides the results, you should definately look at the source-code behind this page to get a sense of what was required to put this page together: