Cms system

Hi All,
I am looking for some system written in Rails (of course) that is
similar to
Joomla or Liferay or ezpublish.

I have only found a few mentioned on the but they
are small cms’es it seems.

Anyone out there that knows something that preferrably is on par with
Liferay, with bunch of extensions and system to write extensions. Full
access control, layout control, themeses, uses a wisiwig editor and much
much more.

I would like a cms system that I can write extensions and designs for,
so I
don’t have to start from scratch.

I would much much prefer a system written in Rails than Java.