I was searching for a good, flexible enough and easy to use CMS. I found umbraco.org. I'm playing with it for a few days now and I think it is very well designed and easy to use. Current version has some bugs but new version is already on the way.
Check out also:
umbraco wiki
umbraco forum
I find out I have to upgrade my knowledge of XSLT. If you tried umbraco you probably know why.