There remains an opportunity for IB to improve its option margining algorythms. For one example, IB can stop requiring margin on both sides of an Iron Condor. Given Timberhill's expertise w/ options risk, and that other options brokers like ThinkorSwim and OptionsXpress can do this, I would think this is in the realm of doable. Also a great improvement for options spread traders, and a spur for increased spread trading volume.
Def, Steve, I wonder if this even comes up for discussion internally?