You can check out the latest BXE Sources with Subversion. Here are the instructions:
svn co http://svn.liip.ch/repos/bxe/trunk bxeor the stable branch at
svn co http://svn.liip.ch/repos/bxe/branches/bxe_1_0 bxeor the 2_0 branch at
svn co http://svn.liip.ch/repos/bxe/branches/bxe_2_0 bxe
There is also a web based interface to the SVN repository: http://svnweb.bitflux.ch/horde/chora/?rt=svneditor