It's ten o'clock. Do you know where your ECNs are?

Instinet buys Island, forms INET
NASDAQ buys BRUT
NYSE buys ARCA
NASDAQ buys INET
Knight buys Attain
NYSE buys Knight
NSX buys NexTrade
NASDAQ buys NSX

Okay so the last three are still figments of imagination but aren't we coming back full circle to the oligopoly of yesteryear? Maybe Reg-NMS will have nobody left to regulate after all!!