No, it's invite-only, and they only invite 1000 people.

I think it was changed for the upcoming conference, but I may be misinterpreting it. It seems like there was a one week period when they let anyone become a member in January 2008, for the 2009 conference. After that, registration was closed and presumably celebs can still get in. But if you had $6000 during that one week period, you could get in. This is in contrast to the previous conferences where you needed an invite to get a floor pass.