http://www.edutools.info/course/productinfo/detail.jsp?id=262
I don’t normally post notifications of every new review we do on the Edutools site, but in the case of Sakai there has been a lot of interest from this community and so I thought it might be warranted. As always, we endeavor to provide descriptive, non-evaluative reviews of the software within a framework that allows you to compare it with other known quantities and for you to make the judgements yourself. For instance you can view a side-by-side comparison of Sakai 2.0 with Blackboard 6 and WebCT CE 4 and Vista here, or look at it in comparison to some other open source CMS (Moodle, Atutor and .LRN) here. – SWL