While looking for jQuery tutorials that were more challenging than the typical beginner tutorials, I found marcgrabanski.com. His now defunct developer blog has a few tutorials on jQuery. Marc posted one on Google Maps and jQuery. This tutorial had exactly what I was looking for. It showed a practical use for jQuery instead of how to create an animated box. Marc walks you through a step by step process of using jQuery with Google Maps. He shows you how to mashup jQuery with Google Maps to create a simple map that overwrites Google Map popups.
If you are learning jQuery and want to try a tutorial that is more challenging and fun, I suggest taking a look at jQuery and Google Maps.