This year overlapping with WebBuilder in Las Vegas is Pubcon. Pubcon is an all encompassing web conference run by WebmasterWorld.
Pubcon will run Dec. 4 - 7, 2007 at the Las Vegas Convention Centre.
I've also just been confirmed as a speaker at this years Pubcon as well. The exact topic my address has not been finalized, but will most likely be focused on either Web Analytics or SEO. More on my address as the details are worked out.
For more information on Pubcon visit the conference web site at www.pubcon.com