Thanks for the interest everyone! We think libp2p is one of the most exciting and useful parts of the IPFS project. We've refactored it out of IPFS for the benefit of the general p2p / networking community.
We're working on cleaning up interfaces, getting to a good level of completeness and interop between go and js, and then messaging/explanations. Stay tuned for proper a launch later on. But note both go-libp2p and js-libp2p are usable and in use now. :)
This is great, looking forward to a comparison between this and https://github.com/tendermint/go-p2p, maybe we'll manage to merge them or choose one or the other.