I just open sourced a portion of a perpetually half-finished ClojureScript game. The project uses ClojureScript, canvas, and affine transforms to build an interactive star map. The star map supports panning and zooming (click and drag to pan, scroll in or out to zoom).
To see the map in action: http://ashenfad.github.com/stars/
To see the project page: https://github.com/ashenfad/stars