Pediax — 'A new, interactive user interface for Wikipedia'

Still in beta but already very cool.

TechnoDolt™-approved, too — even I can use it.

Lucas Graves, in the March 2007 issue of Wired magazine, wrote, "It's a cartographic flyover of Wikipedia — as you mouse across Earth, the map fills with markers for any place or landmark that has a Wikipedia entry. Click 'em to bring up a brief description."