A zooming zip code locator (requires Java)
Ever wonder where zip code 54321 was? Well, now you can find out that it doesn't exist ... but that 54324 is Green Bay, Wisconsin, and 43210 is Columbus, Ohio.
It's sorta interesting as a geographical map of population density, too.
And, flying windmills: Extract power from the jetstream for, according to Sky Windpower Corporation, a lifecycle cost of 2 cents per kilowatt hour.