I'm considering making a Chrome plugin that watches as you play provably fair games and checks the hashes for you. I think it would add value to players who don't know how to check the hashes for themselves, or can't be bothered to. And having it developed by a third party rather than the house itself adds weight to its verification of your fairness too I think.
That's a good idea. I use Firefox, and Chrome, but Chrome didn't seem too big on addon or plugin availability last time I checked. What about the sites that don't release the secret till the next day?