I recently commited the first bits of source to the project's CVS repository. You can go check it out at http://pjplib.cvs.sourceforge.net/pjplib

The current version of the source still needs a lot of work.
  • Implement the sound system (OpenAL)
  • Develop the sprite engine


These are key features that must be implemented before the first release.

Also you should check out the SVN repository http://pjplib.svn.sourceforge.net/viewvc/pjplib and get yourself a tarball.