I went a few times in New York and Las Vegas. The expo itself had little value to me, but I liked the possibility to meet many traders there. Just make sure to bring your BS detector, because there will be plenty of it, BS I mean.
The "free" seminars are pretty much infomercials, with little value, except for the vendors/gurus. As I said earlier, bring your BS detector, and be prepared to hear it a lot !
i went to las vegas last year. it was fun and interesting and i am glad i went to one but wouldn't do again. it is pretty much infected with forex get rich pitches but there were a few good trading seminars.
last year one of the biggest exhibitions was franz making big money trading live. we all know what happened there.