Nearly 2 weeks ago, Tullet Prebon announced their SEF filing with the CFTC, which inspired me to do some research into the SEF registrations to date. I blogged about it here; who they are, what they had planned to provide, etc. Towards the end of the blog, I posed the question, where were ICAP, BGC, and Tradition? For an update, please see my article "SEFs: Who's joined the party?" Tod Skarecky