Mmmh, when I got interested in Freenet back in 2000, this was about the only project for anonymous and decentralized publishing and retrieving of data. I have taken part, contributed a bit and followed the project in general. However, despite having a paid fulltime developer for more than a year now, I am a bit disappointed with the state in which freenet is today. Looking around for alternatives today, it seems that I missed a whole bunch of parallel projects started to achieve the same. Some have been inspired by Freenet, but some we “conceived around the same time” (mnet).
So, there are: grapevine, entropy, mnet, gnunet,… and of course similar networks like invisible IRC at various stages of development. What a pity to see so much brain power working on redundant projects. But then, hey, choice is good 🙂