Interactive Google Maps Code Tutorial

Code Tutor has a nice interactive Google Maps API tutorial.

The tutorial provides a step by step guide to building a Google Maps based application. It takes you through the steps of creating a map and adding markers, information windows, Street View and polygons.

Code Tutorial allows you to adjust the html and JavaScript in the code editor and see the adjustments you make by executing the code in a separate panel. It therefore provides a great hands-on guide to the Google Maps API.