Hola Eduardo.
En esta lista intentamos que se hable en inglés por su naturaleza internacional.
Those packages are a development preview, that's why that repository hasn't been officially announced. But if you feel a little adventurous you can try them in a CentOS 6 system.
It's true that the virtual demo appliance it's quite old, but we haven't had the time to update it. There is a demo site running here:
http://demo.openmooc.org/ but it doesn't have the latest version either. Right now the only way to try the latest OpenMOOC is deploying it.
Regards.