This is really cool. I got to watch Sean Bowe&#x27;s side of the transaction at FC&#x27;16 in person. I think I saw somewhere that a faucet that pays for sudoku solutions is being worked on.<p>From reading up on this a little (and confirming with Sean), it seems that before the payment is committed the solution must already be available, so this may not be a good protocol for expensive to produce, bespoke solutions that are only of interest to a single buyer. If, for example, I wanted to buy the factorization of a 768 bit RSA modulus, someone working on a solution for me would have the risk of me not paying - I still would not get the solution, but they&#x27;d be out the computation costs.