I've posted version 0.1 of the GLRThreading Engine. It is currently only suited for Windows and Xbox development or more precisely: any Windows based systems, but once I get to the final 1.0 release you'll have a threading engine, along with a generalized sync mechanism and a dependency graph to manage - well object dependencies!
If you have any feedback on the system please email it to me and if you want read about it in-depth, then buy a copy of Game Programming Gems Volume 7. I have an article detailing it's general architecture as well a bunch of general threading techniques.
The GLRThreading Engine will be used inside the GLR Cognitive Engine, as many of the internal systems require the ability to execute in parallel ( group promotion management, link management, memory migration, etc..).