I am looking forward to Hornet[0]. The authors haven't put a PoC out yet. It is described decently in a recent mailing list post[1] (and impl[2]) on a BitCoin decentralizing project. A quality project might take the speed of the Hornet protocol, the tor hidden services approach, remove the exit node concept, make everyone a relay, and incentivize bandwidth sharing.<p>0 - <a href="http://arxiv.org/pdf/1507.05724v1.pdf" rel="nofollow">http://arxiv.org/pdf/1507.05724v1.pdf</a>
1 - <a href="http://lists.linuxfoundation.org/pipermail/lightning-dev/2015-December/000384.html" rel="nofollow">http://lists.linuxfoundation.org/pipermail/lightning-dev/201...</a>
2 - <a href="https://github.com/LightningNetwork/lightning-onion" rel="nofollow">https://github.com/LightningNetwork/lightning-onion</a>