Here's the first public example of the EarthBrowser plugin, it requires Flash 9. it shows the current position of the International Space Station. Use your mouse wheel if you have one, or click the globe and use arrow keys to zoom out and see the Hubble Space Telescope and the TOPEX/Poseidon satellites.
This is a simple example with no extra datasets or interface elements and limited zooming. I hope to have the Javascript API available sometime next month.
Imagine a zero-install, completely programmable virtual globe that understands KML on your website.

