I just created a branch for Asterisk that has everything required to test the chan_zap MFC/R2 support. Now the installation steps are easier.
1. Install zaptel from 1.4 branch http://svn.digium.com/svn/zaptel/branches/1.4
2. Install openr2 library from the trunk svn://libopenr2.org/openr2/trunk
3. Install Asterisk from the MFC/R2 branch: http://svn.digium.com/svn/asterisk/team/moy/mfcr2
Some people in brazil has now reported success with basic call setup. Configuration info is available at the bugtracker: http://bugs.digium.com/view.php?id=12509
The libopenr2.org site is up, but empty 🙁 , right now I just have the SVN server, but info will be added soon as well.