Well well well. A possible trip to the US looks like it might coincide with the AVN Adult Entertainment Expo 2013 to be held 17-19 January 2013 at Hard Rock Hotel & Casino in Las Vegas.
Daily VIP Passes are at $85 and General Admission Passes are at $65.
I'll only be free on the 19th anyway, so if I do go, I'll most likely spring for a VIP Pass. Some details, such as the parties and stage shows, are still missing from the website. I'll wait for these to be put up before making a final decision.
Meanwhile I've been looking up some YouTube videos to get an idea of how it'll be. Embedded 4 of these below. Looks like good fun.