I came across Google Sky when playing around with Google Earth! I wonder whether this was in response to Microsofts World Wide Telescope?

This is really cool though! I reckon the best thing for mass digital map access since Google Maps!

I wonder what applications can be built using this technology? Perhaps augmented reality glasses, whereby you can look at the real stars, then zoom-in to see what they are like up close? ...

Or a similar thing using a mobile phones camera to calculate where it is, and overlay information about the stars it can see ...

or, a way to automatically calculate hyperspace jumps instead of days calculating them by hand... oh hold on... reading Asimov's Foundation series must me making me into a sci-fi geek! :S