The Android project is really interesting — I’m not sure exactly what’s happening at the VM level there, but I’m sure the’ve done some interesting stuff.

The LLVM is an interesting project too, but it seems a little low-level as a platform for dynamic language collaboration. But it also looks like they are building some tools for higher level collaboration.

I do really think that there is a chance that standard hot-spot optimization system, memory management infrastructure, and perhaps even thing like dynamic method lookup systems and some of the other DLR infrastructre tools, make sense as shared components across dynamic languages.

And right now the JVM seems like the platform that’s most likely to make that happen, but I’d be happy if it were the LLVM, or any other “open” solution.

PyPy people put the most focus on LLVM. I’m surprised no one took CPython and tried targeting it to the LLVM (maybe just at the bytecode level).

We are definitely going to try to get more cooperation between JRuby and Jython – it just makes sense to do.

I’m sure that any of us would be happy to sit down and talk with you more at PyCon.

The specific project that aims to relieve us all of the pain that is JNI is JNA: https://jna.dev.java.net/ The JRuby guys have already implemented some Posix compatibility for JRuby, and this work is on the short list for our (Jython and JRuby) collaborative efforts.