I'm sure I'll be docked some geek points for admitting it, but I have yet to actually see Avatar, but it is on my list of likely short term BluRay purchases. The Wired piece mentioned that in order to boost the world of Pandora into the geekdom status it needs, James Cameron and the crew was putting out a lot of background information into the "pandorapedia". It has a bit to go in terms of matching Wookieepedia, the Star Wars Wiki in terms of user involvement, or the official Lucasfilm Vault in terms of depth of content - but as a brand new property wanting to be taken seriously, I find it refreshing and inspirational.
Frank Gehry is the man behind two of the three sets - both his Bilbao Guggenheim, and Falling Water (image on right/above from Lego.com) - it is only available online for $99 inside the US (the much smaller and simpler landmark sets go for $19 each). I must admit that it is almost tempting enough to go for something like JetCarrier to ship it over here, or trying out some friendly connections across the pond... if you've seen Twilight (movie) you've seen something like it with Hoke House