I did say it was the non-hildonised version, but it does work reasonably well if you can figure out the keyboard shortcuts.

Cursor/Arrow keys pan around the sky. Holding shift key will pan slower.

Tap screen to select an object and space bar to centre on the object.

Ctrl+up/down arrow keys to zoom in and out.

Hold the stylus just inside the bottom right of the screen and then swipe it off the screen diagonally to get the bottom and side bars to show. All functions and settings panels can be accessed there.

It takes a bit of getting used to but it all comes together with practice.

Not sure why the author pulled it, (maybe the same thing happened there as did with Instinctiv Media Player). This is his home page: http://stellarium.org/. See if there's an email address there.

Not sure what that mobile-gui does but I've downloaded it and I'll check it out.