I've been going the past few years due to my employment with Wave Arts... just got here to the hotel in Anaheim. Stick Enterprises has not been exhibiting at NAMM the past 3 years, so I was lucky to catch their last show in 2005. I think they feel their energy is better spent promoting the instrument and players in other ways.
The show is cool but does lose it's appeal somewhat after each successive year (at least from the perspective of having to man a booth the whole time).
I find I still have to check Harmony Central for the press releases after the first day to actually figure out what was released, it's so big and a bit of a circus inside!