http://www.youtube.com/watch?v=bOmt-zFaBE8&feature=related How is this any different then what Locals and floor Traders have done for decades ? Technology just makes it easier for the average Joe now.
1) You were never a floor trader, were you? 2) "Average Joe" isn't doing HFT. Super-Mega-QuantGeek-Joe is doing HFT and the "2%" number could actually decline as the weaker players fall by the wayside.
Is anybody selling High Frequency Trading Appliances similar to http://en.wikipedia.org/wiki/Bloomberg_Terminal http://en.wikipedia.org/wiki/Cobalt_Qube