I've thrown some things together this week, to implement code coverage anaylsis for ofbiz. The code itself is not tied to any particular code coverage tool(there's a plugin system for it). Currently I have one written for cobertura, but that's gpl, so not compatible with apache.
The first run I just finished had some test failures. I haven't looked to see if this is because of the coverage plugin, or some other reason. Anyways, without further ado, here is the output: http://www.brainfood.com/ofbiz-coverage/ Things to note are the entity, service, and minilang components. Those have so-so coverage. However, just about every other component has no testing whatsoever.