Standard Geolocation Field in Drupal 7 allows displaying of content only as a static image, using static Google Maps API. This solution is very limited: users can't scroll the map, zoom it nor change display type. I've implemented a patch which allows you to replace this image with dynamic, scrollable and zoomable map, which you know from many sites (including http://maps.google.com :) ).
Model-View-Presenter is an architecture pattern used to design and implement user interfaces. It's a successor of Model-View-Controller (MVC). One of the most important uses of MVP implementation is Google's GWT. There is also an article about large scale application development and MVP by Chris Ramsdale from Google.