Thanks for your mail. As you have noticed Fenfire is a separate project from Xanadu. While ZigZag (the data structure model of Xanadu) uses connected linear lists as its structure, Fenfire uses RDF graph. What is left from Xanadu ideas are xanalogical content or links, e.g. copy-pasting refers to original content instead of just copying content. The difference between projects, well, raw visualization of linear spaces was a bit easier to navigate with ZigZag like structure, since humans get easily lost in graph structure as there is no clear direction. To my understanding views should be specific to data structure and point of view to provide best value for user. This, however, makes it difficult to produce general purpose data tool.
Your question/wondering about what's happening is easily answered: mostly nothing. Ideas of Fenfire live but none is working on code level, at least to my knowledge and codebase is getting rotten. Fenfire was originally built with Java. After Tuomas understood how cool accelerated graphics is native C++ side was added to add OpenGL support. Benja and Tuukka did some work on Haskell implementation.
). Today there exists many RDF database implementations and time for building Fenfire for web will mostly take less time.