No, it was a huge effort from a bunch of people. When RealmForge blew up and all the projects parted, CeGuiSharp was pretty screwed. Luckily Cygon came around and put it all together.
All I've done on CeGuiSharp was start up the Tao.OpenGl renderer and the XNA renderer. Unfortunately both don't work [sad]. If you want to check it out in its current state, get the SVN and check out Cygon's 5.0 branch.