Update
MODx revolution public has been released. My opinion about it? You have to spend a while to learn how to use it. It seems a bit complex so if you want something easier to learn, go with wordpress 
I am waiting for the MODx CMS to release the revolution version. The MODx CMS sounds very promising. You can check the road map at http://svn.modxcms.com/docs/display/revolution/Roadmap
There are many saying that wordpress is mainly for blogs while MODx is better for building web pages.
So I downloaded the MODx Revolution 2.0.0-rc-2 and played around a bit. At a first glance it seems complicated but if you spend few minutes with it, things get clearer.
I will keep you updated.
