Any chance you could offer users the option to display all amounts in the currency of their choosing? Many of us do not follow the value of BTC day-to-day (or minute-to-minute in some cases), so it would be handy not to have to convert mentally every bet into your home currency before placing it.
I'm with erol34 on this one, it would be useful to show BTC and/or USD. Most of the other books are USD so betting against them requires an added calculation. Plus as erol34 said there's the fluctuations. There's more to sports betting then picking one side and win or lose.
We believe most of our users are aware of the current BTC/USD price. We will have surveys on Fairlay in a few months and we will add a question about BTC/USD conversion there.