I was there... 50% was electronics. Lots big companies like Autronics, Haltec and much more. Also lots of companies from oversea like China, TW and so on. Its worth the trip..... www.lextreme.com/sema.html
I have been using the Megasquirt ECU for my 20v 4AGE in my lotus seven. Have you any experience with it? I love it and i am thinking of putting one on my 1uzfe. Fully programmable system for under $350.