I've added a document "Introduction to Cavor and Overview of Components" to the project library that gives a better description of the goals of Cavor. It also gives a more detailed look at the various components making up the overall package, and their approximate development status.
Also, the SourceForge project statistics seems to have a bug; for example, recent commits and adds to CVS are not being counted in the history on the project summary page. There's been more activity than it seems. (The CVS is being updated, just the summary statistics are not.)