[cgh]

EDIT: this appears to be a different "Gemini" than the one I'm talking about here - in a comment below, it's mentioned that the tested Gemini is built and maintained internally. So the next paragraph is probably irrelevant.

Note that Gemini is an OSGi framework built on top of Spring DM. For those who don't know, OSGi is Java modularity "done right" - basically a very loosely-coupled module system (which Java lacks) on steroids.