Unfortunately not. After the theoretical work on an architecture I had started implementing a prototype, in the meantime evolving on the DHT used and specifying a preliminary protocol format. See Hash2Pub.
Unfortunately, that work never got to a usable state. While I do still plan to resume that work if necessary at some point, it does not have highest priority so far to me. So feel free to ask me on details if you’re working on this yourself.
Regarding full text search, I’m sure that an architecture for that would make significantly different design decisions. There is work on combining multiple queries already on their path back, but these always looked challenging from a security point of view (risk of censorship or faked replies).