I have embellished a number of weblogs that I oversee (Personal, Virtuoso, and UDA) as part of an OpenLink technology "dog-fooding" effort. We now have SQL-XML based RSS 2.0 feeds that make an array of content available for RSS Aggregators as well as ad hoc XQuery and XPath queries over HTTP/WebDAV.

Feed Description
Virtuoso Documentation Product documentation available as a collection RSS feeds per chapter with a feed catalog in an OPML file.
Data Access Driver Suite Documentation