Oh, cool to see my little project on here, just in time for some lunch-time procrastination. Happy to answer any questions.
While cool, it isn't nearly as cool as the current title (Cxx.jl: C++ interpreter embedded in Julia) implies, since it is not a C++ interpreter. A more reasonable title could be "The Julia C++ Foreign Function Interface" like the subtitle of the project.
It actually is a C++ interpreter ;), that functionality is just not advertised: http://imgur.com/miYn092
That is pretty amazing, you should definitely advertise it!
We'll it's been a pain to build so far, so I've been avoiding making it known more widely. That's about to change though.