No files have yet been released. As soon as that happens, you can get them at the project's file list.
Meanwhile, if you want to take a look at the development code, you can take the files via CVS. It's as simple as:
cvs -d :pserver:anonymous@cvs.sourceforge.net:/cvsroot/openbash-org login
(use an empty password here)
cvs -z3 -d:pserver:anonymous@cvs.sourceforge.net:/cvsroot/openbash-org co openbash-org
If you'd rather use a web browser, you can use the CVS web front-end. You can also download a nightly CVS tarball generated daily with the latest contents of the CVS repository.