Google Earth in the browser
Google have just launched a browser plugin which allows you to embed Google Earth into your web browser:
Currently looks like it’ll only work on Windows. The video above seems to make it easy to switch from a Google Maps API mashup to a Google Earth API – here’s a example and the plugin download is only triggered if someone selects the ‘Earth’ view.
Not sure if this would really give any great benefit to the MSG Presence Map, but if anyone can give me case when it may be useful then I’ll get it added!

Came here by Google looking for answers on embedding maps on my page and just wanted to say thank you for your help!