I'm in Norfolk, Virginia working with Declan de Paor and team at Old Dominion University this week. I've already had a fascinating time looking at their latest work (see an old post for more details of the type of thing Declan does). An example is a model of the earth below Iceland, screen shot below.
The great thing about this project is that unlike most TEL (Technology Enhanced Learning) projects I've been involved in, the team here have a lot of technical examples working already and we're just starting! A lot of TEL projects start with a teaching idea without knowing how to produce it technically which means that little or no time is left to find out if the learning technology works as the team's time is absorbed in solving technical problems. So I think this project is really going to produce some excellent materials and push forward the use of Google Earth in education.
Google Earth API Use: One thing Declan's team are doing that I think is really clever is that they're using the GEarth API to reduce complication. Instead of having lots of controls like the compass control and layers panel in the GEarth client, they use the GEarth API showing only the controls that they need which simplifies the tool for students. Unfortunately they haven't published any examples yet but I'll point them out when they appear.