Aduna Metadata Server 2005.1 RC1 Release "The Aduna Metadata Server automatically extracts text and metadata from information sources, like file servers, intranets or public web sites. The extracted information is available for tools such as Aduna AutoFocus and Aduna Spectacle. These tools enable the user to find and explore information by using the extracted metadata. Other tools can also make use of the extracted information by use of the Sesame library (see www.openrdf.org)."
I see a lot of similarities with what we did at Tucana. The metadata server is basically TMex - which then became the content handlers and resolvers in Kowari 1.1 (without the document workflow). They also have the commercial visualization add-ons.