Gosh. Stamen Design, all-round-awesome data visualisers (and creators of one of my favourites – the lovely MTV VMA twitter traffic visualisation) have been working away with the people at Mondo Window to create the first site designed specifically for use with in-flight internet, and one that enables you to see what you're looking at out your airplane window, as you fly above it.
Fill in your flight details and the site accesses the various APIs that track where planes are and plots a map showing you what your flying over, overlaid with content from Wikipedia and Flickr. Brilliant. Shame mobiles and planes don't mix so well – it would make for a brilliant augmented reality phone app.