The code's all there: see https://code.launchpad.net/openstack. "nova" is the name of the compute component. As I said upthread I find Launchpad's UI confusing, but I think http://bazaar.launchpad.net/~hudson-openstack/nova/trunk/fil... is the development trunk.

http://github.com/openstack/nova is a github mirror of the same code, I think.