As the post title asks "Did you hear about ECM Maturity Model?"
If you are not, go and visit it, and download this document. It is great job, but what I liked is page number 12 and the matrix there. I didn't use it in a project but I imagine it will be helpful for me as a consultant working in a project where using it I can assess how much maturity we reached in that project.
However, the website and the document lacks a lot of information, may misguide some people. Also I saw the same things discussed there before, like for example in Bex's last book "", but really I like their remarkable maturity matrix.
Anyway it's nice work and I advice by taking a look on it.