Just launched: a very nice new web client for reading Kindle books from Amazon, for use in Chrome or Safari on your laptop or iPad. The reader uses HTML5 to enable offline reading - as soon as you open a book while online, it's downloaded to your browser in the background so it's available for offline reading. Quite slick.
The Tour De France stationary exercise bike from ProForm uses Google Maps to simulate any public street ride in the world, simulating the resistance (and tilt) of elevation changes as well as the wind resistance created by the rider's motion. That has to be one of the best "non-mapping" applications of Google Maps data that I've ever heard of.
When is someone going to come out with a treadmill that does the same? You could walk into a hotel somewhere and run the exact same course as at home. Or you could practice running the New York marathon from anywhere, with every hill included.