@BkkCoins:
1) What's the BOM for that? (part specs)
2) Looking at the small size of this, it should be feasible to make a 2-4 chip version of this, with very minor modifications. That would be an excellent choice as it would beat most GPU's and FPGA's. People seem to insist on USB hubs and so on, but that is completely irrelevant if one just replaces the USB power with an external standard 5V@2-3A (10-15W) supply.
In any case, if you can get this working, I'd like to buy one of these from you for a public art project to promote crypto-currency adoption. [I know it may sound little, but as I have given up on making any kind of profit on this subject, I've moved towards not-for-profit-projects that help educate people about the future of banking and currencies.]
2) I think it would be a big headache for Bkkcoins to go this route as a lot of non-savvy IT people (who don't read) would just complain that their USB miner isn't working and let's face it, we can already see so many of these people in these forums.