Erwin Nikkels from Google Globe writes in about his recently launched Earthbooker.com, which integrates Google Earth with an 80,000-strong hotel database from Interactive Affiliate Networks, a division of Hotels.com. You can search, or else browse hotels in Google Earth via a network link. Instructions and details here. Because Google Earth is a browser, not a web app, it lends itself perfectly to commercial services like this one. After real estate and tourism, what industry will be next to take advantage of Google Earth?