The alpha version of my project is out. If you're interesting, please try it and give feedback to me. I'd like to attach the overview of my GSOC project to make you know more about it. If you want to try it, you can download the code from the svn site svn://seul.org/svn/pygame/branches/physics , there're 4 test case in PYD folder now, enjoying it.

              The overview of my GSOC project

My project is a 2D physics module for Pygame(like box2d and chipmunk). It's written in C and it uses basic Python # structs and functions, which means this module can be integrated with Pygame seamlessly.
 
My initial goals are :
* World support with body and joint management, gravity and damping
* Body support with mass, shape, velocity, friction, torque,
  rotation value, linear and rotational damping
* Joint support including distance joints
* Shape support with AABB and OBB collision detection, rectangular, polygonal and circle shapes

There are serveral ways to make the project successful:
* I set my goal at the beginning and made a schedule and a roadmap to guide my work.
* I've been contacting my mentor and discussing with him regularly to report my current work and the problems I met, so I've got so many helps from him and I can solve problems quickly.
* Learn form other physics libraries and some papers for physics simulation algorithms.

Current status of this project:
* World support is fully implemented
* Body support is fully implemented
* Joint support is fully implemented including distance joints(tested) and recently added revolute joints(still on working)
* Shape support is implemented with collision detection and rectangular shape support
* Interfaces of the Python module.
* C API extensions.
* Most parts of the module are stable and work as supposed. It lacks large optimizations, especially for the collision detection, but those are
areas being worked on later.

Finally, Thank my mentor very much, he's so conscientious and gives me so many helps and guidances.