The Python language is a great inspiration.
The intention with ShapeLogic is that it will turn into a real OSS community, unfortunately this involves some red tape and there are a few legal issues. They are described in the book: "Producing open source software," you can find the whole text online at http://producingoss.com .
The main point is that if somebody challenges your OSS project in court, there needs to be an entity that can defend it. This is described here: http://producingoss.com/en/producingoss.html#legal
A Google Code Hosting project called shapelogicapps has been setup. Anybody can join shapelogicapps.
If you are interested in contributing to ShapeLogic, start by making your contribution in shapelogicapps. If the contribution fits, it will be code reviewed, and it can be migrated into the core ShapeLogic toolkit.
When you have some experience and if you are interested, you can become a member of the core ShapeLogic team.
If you are interested in joining the ShapeLogic development please contact Sami Badawi: sami.badawi at google mail Or you can leave a message on http://code.google.com/p/shapelogic/wiki/ShapeLogicTeam