In the video it was mentioned that you can "go ahead and trade your bitBTC for bitUSD".
I thought you have to trade bitBTC -> BTS -> bitUSD (so fighting two spreads) but I see you can manually search and find the bitBTC : bitUSD exchange... although it's bare
It'd be neat if bitshares did something like the ripple pathing that happens automatically, finding you the best price between two assets. I guess that can come in time...