Can you add the cryptoswap algorithm using data from choosecoin.com to make miners automatically swap currencies to the best profitable coin?
Charge 5-10% and make payouts in B?
The btc-e api is easy to use to do Multi-currency to B conversion and withdrawal. The .6% fee would be absorbed by the special pool fee. You could also set all miners to swap after a new currency becomes more profitable && a block is found in order to not swap currencies mid-block.