To check out the latest version of Elements, which now supports setuptools and the much more stable pybox2d 2.0.2b1:
svn co http://svn2.assembla.com/svn/elements elements-svn
If you would prefer the older version with pre-compiled Python 2.5 libraries included, try revision 217:
svn co -r217 http://svn2.assembla.com/svn/elements elements_r217
FYI,
Several users have reported that the GIT information above, appears to be not working. Not sure where the problem lies. -Ixo