I’ve blogged about Amazon Web Services and how one can leverage those services to develop scaleable applications, but now Google has gotten into the act. Google App Engine will let you to develop scaleable web applications using the same Google technology that powers their own web applications such as Google Maps and Gmail. Taking a quick look at the Google App Engine Docs really shows how this can be a great toolkit for GIS developers. A Python Runtime, Datastore API (Bigtable) and a URL Fetch API all line up very well with where GIS web applications are going.