I'll see if I can get volumes added to my assets page, shouldn't be too hard. The market cap is a little trickier cause you need to determine the price of a bitBTC and bitCNY etc, prices which aren't readily available atm. If I were to assume a 1:1 ratio for each asset it would of course be easier.
For now you can already find the current share supply, 487,800$ for USD and 29BTC for bitBTC for example, on the assets page. Those two are the only active assets currently, CNY has some shorts and asks but no trades so far.