If Redi goes, then I can't trade the SPY's anymore. It will be time to trade something else. What really bites is that I used to watch the Island bid fall out then immediately short a weak NYSE stock and get filled on that bid (sometimes). Island traders had gotten so fast at bailing I could use them as a leading real time indicator in some cases. They are really screwing this one up for us all....
i still trade the QQQ's on isld at IB. i set my limit near the realtimequotes and get a fill at once. As you know isld give the best price available.