The Choose Your Own Adventure README for Nova:

  You have come across a cloud computing fabric controller.  It has identified
  itself as "Nova."  It is apparent that it maintains compatability with
  the popular Amazon EC2 and S3 APIs.

To monitor it from a distance: follow @novacc on twitter

To tame it for use in your own cloud: read http://docs.novacc.org/getting.started.html

To study its anatomy: read http://docs.novacc.org/architecture.html

To disect it in detail: visit http://github.com/nova/cc

To taunt it with its weaknesses: use http://github.com/nova/cc/issues

To hack at it: read HACKING

To watch it: http://184.106.205.70:8010
And again.
And yet again.
And again.
And again.
And again.
And once more.
And yet yet again.