OK, ignoring that I 'use' gox to trade, when we aren't in a post-exponential shit-storm, I keep a subscription to Sierra Chart and run it on a virtual PC to watch the chart and do my TA magicky stuff. The problem with the exchanges is that they essentially 'break' when you can really make good money, forcing your orders to the sidelines (they're non-reactive to market and limit order on volume spikes) and so it almost doesn't matter anyway. I'm prolly not the right one to ask.
windjc, seleme, aminorex, adambtsgtsrtdtdtsdts... who else trades a ton?

Hope that helps.