My colleague Ji Yang recently developed some neat code to implement a movable magnifying glass or "microscope" that reveals more details on any spot on the map, without zooming into the map itself.
You can download the simple HTML page that implements this effect here. And here is the icon referenced in the page. The demo works off the sample MVDEMO data set.
Anyway, here is a quick screen shot with the magnifying glass spotlighting on two different locations on the same map.