My design approach is to take out the noise: If Bitcoin is really a currency, why should we care so much about BTCUSD's volume? Why should we even see the order book? I know these are two important components for every market, but it's not important to everyone.
I still appreciate your coding skills but... we are making new economy here and you are selling "sugar water" or gambling site...
I hope you have at least read Bitcoinica's About and FAQ or have tried out the service.
I'm personally a Libertarian Anarchist (free-market advocate) and I take Economics courses. Bitcoinica gives everyone more power to trade, while helping miners to hedge against their losses when Bitcoin is dropping. Majority of the trades will be directed to the spot market and to increase liquidity.
I believe that Bitcoinica should have added value to the community.