That combined order book on bitcoinity.org appears to be a new feature.
It works pretty good.
I wished there were a feature on the site to eliminate some of the exchanges, too.... but hey, beggars cannot be choosers, right?
I do see that if I hover the bar over any of the particular exchanges, it will show the order book for that exchange by itself. That could be somewhat helpful when attempting to look at Bitstamp by itself, for example.
by years end .....
