yes you can go, but you have to pay. the only way you can get in for free is with a press pass or to be some somewhat high ranking guy in a company that has to do with video games.
i went in 2000, it was a blast. there was a lot of fun stuff to play with and the booth babes! wow, they were a great diversion to the cool gaming stuffs. i work for best buy so i was able to fenagle myself a hookup t o go for free. three of us went and made a roadtrip out of it.
i really enjoyed it overall but wouldnt recommend taking tooooo much trouble to get there. it is really designed mostly for industry insiders but then again, i was very glad i went.