RDFWeb isn't really organised into distinct projects, but some themes are emerging. This page should evolve into an entry point for people interested in what RDFWeb can do, rather than the way in which we achieve this. The developer resources page provides more details on the underlying machinery.
Until we get FOAF documented, we don't really have any proper sub-projects. For now, take a look at the sitemap listing to see some of the areas we've been working in.
The most distinct sub-project of RDFWeb at the moment is the co-depiction experiment. The FOAFCorp experiment is another reasonably discrete project. However our main initial project, deploying a Web of FOAF documents, has yet to be convincingly documented or deployed. As a consequence, all the other themes are rather tangled up at present...