On top of the Sonar stuff, I ran Atlassian Clover over the whole project to get some coverage stats.
The results of which you can find here: http://www.meteorite.bi/downloads/clover/ As you can see we currently stand as 26% coverage. Handily the clover report tells us some stuff about what's missing. So on top of cleaning up the code, I can finally look at adding to the test suite. Tom