A nice intro to CMSes. Not a scientific article, but easily read.
Plone is similar to Magnolia in many ways, more powerful in some areas, weaker in others. Very content-specific domain model. Can not be abstracted into anything else than content. Nice that the CMS has themes, as well as new-content-wizards and template editor.
They call wiki-text structured text. But why wiki when you can wysiwyg? :)
Overall, nice intro to Plone, and some good ideas for WCMS in general (requirements). I could've used Plone/Zope as a candidate in my comparison, but my scope is too small I think (will stick to the java ones).