You may want to recheck out Imindi which you profiled when we were in our prototype phase last year. We are currently in private Beta. Take a look at our Blog http://imindi.typepad.com.

Our approach at Imindi (An application built by a team of Phd computer and neuro scientists) is to take a “mind” approach to helping people to construct their own “mind maps” of connected thoughts and information on any subject. These Mind Maps are little semantic webs that work “As we think” and the “Thought Engine” (Semantic Graph) at the core of Imindi enable Like Minded people (Social Graph) to connect and combine the Thoughts, Information and even Create Knowledge. At the core, all the semantic linkages from every body`s public mind maps collape on themselves to form essentially one global mind map.

However, the closest vision to what we have built was not that of the Semantic Web, but that of the Memex by Vanevver Bush – but as we build a layer of thought and meaning over the information on the web…I would suggest that we are also very much a Semantic App worth watching.

http://www.imindi.com/journeys/382-semantic-web/maps/3195155-semantic-web