I had an initial crack at converting the Freshmeat data export into FOAF. Transform and data are here. Mailing list announcement. Probably should convert to DOAP these days though -- LeighDodds
Paul Ford's files of data on the U.S. Senate: senators.rdf, Senators_GIA.rdf (See also his XML.com article on this project).
The Simile Project has zipped files of RDF in the subdirectories of the directories listed. See also the README file.
Semantic Web Environmental Directory: Download portal.zip from the Technical Resources page, unzip it, and you'll find 380K of n3 files in portal/web/data/swed and a bit more scattered in other subdirectories of portal/web.
Profiles (background on Agent Profiles) for a long list of devices.