Quicktime VR photos of Tokyo - tunnels - night - large drains - buildings - etc. The nav is mainly in Japanese but the "VR List" link, lower right, seems to be the main index.
The Louvre 360 by Virtual Sweden(?) has panoramic photos of the museum. Press 'SHIFT' to zoom in, 'CTRL' to zoom out. Panorama-o-Rama.
360-degree video appears to be just like QuickTime VR, only it moves. There's a trippy demo over at Atom Films that uses the technology to put you in an old-folks home. But the downside to 360-video? Lower framerates, and the need for a special camera.