Several of us at Calxeda have been working on extensions to
lava-dispatcher with an eye toward using it as a general test management
engine not just for individual platforms, but for whole clusters of
machines as well.  We've broken our extensions into three feature
branches, which can be found at https://code.launchpad.net/~david-schwarz:

  We'd be interested in any feedback anyone has about these features,
our implementations, etc.