Google Earth and satellites?

Here's a challenge for the Google Earth champions: incorporate live satellite tracking.

There are all sorts of Google Earth applications which show features on the earth's surface, but none which show the hundreds (thousands?) of satellites in earth orbit. Why not?

How difficult would it be to set something up so that we could represent the satellites, see the different rings of satellites (near earth orbit, geostationary, GPS etc.)?

Something like this.

Further data might be provided:

...a picture of the satellite when you clicked on it
...speed of satellite
...launch data (who launched it when, with what rocket)
...who uses it, for what purpose
...as with the NASA application above, show the ground track, zoom in, out

Obviously some of this data is proprietry, but I think it would also be nice to know just how much we don't know about these objects..