Graph is currently just in-process (no cross-machine distribution), although it's definitely a possibility down the line. The currently released parallel strategy is also just a pedagogical example, not really meant to be used.

Here's some WIP on a more practical parallel compilation: https://gist.github.com/w01fe/4710008 Once the kinks get worked out this will go into the OSS project. Presumably concurrency level will be controlled by a parameter, and/or passing an appropriate ExecutorService.