SubSquare has completed phase 1 of their storage network and has been posting weekly updates on the forum. They have also been working on two other projects that contribute to Polkadot: integrating Move to Substrate and working on Strawberry, their client implementation of JAM. Anyone can now create a Move parachain on Polkadot. Links to their full proposal, initial research, forum discussion, and OpenGov Phase 1/3 are available. Check out the book for technical details and instructions on how to test the storage network.