If I could adopt a conference, it would be the USGBC Cascadia chapter's Living Future 'Unconference'. As someone who generally prefers to stay behind the scenes talking shop, it was a delight to find myself surrounded primarily by the obsessed of the green building world. Even better, as presenters we were encouraged to bring our own big challenges to the table and get attendees to help us address them — which is exactly what we and many other presenters did. (More about that later, I hope.)
First, this is the only conference I've been to where I left with less stuff than I started with! Yes, you could buy a conference T-shirt (lovely, organic, low-impact dyes, made in the USA), and I did get some green building playing cards, but there was no bag full of conference papers and booth swag. Instead, at registration we were each given a paper nametag and a single tri-fold with the conference schedule. For details, you had to wrest control of one of two computers hooked up to a screen set to scroll through sessions. I, of course, lost my tri-fold, and there didn't appear to be any spares.
Paul Hawken's keynote speech set the tone for the conference with kudos, encouragement, and warning for the audience; kudos for the work going on to transform the world for the better, encouragement that we are not alone (visually demonstrated with an endless scrolling list of nonprofits that can, by the way, all be found on WiserEarth) and a warning of radical changes to come that'll put green practitioners on the front-lines. "I just want to caution you. I think your star may rise faster than you'd want it to... I'm not saying this to flatter you. I'm saying this to warn you."

"Green buildings have captured the imagination of many in the mainstream, but for green professionals the time has come to stop designing for mere energy efficiency and start designing to regenerate and restore. And that means taking responsibility for what people do in buildings and communities after they are built." — 
The 96th annual meeting of the 
Face It Webcast to be Broadcast Live at 9:00 AM on January 30, 2008
"Educating the construction leaders of tomorrow is a core part of USGBC's mission, and our support of Architecture 2030 in this essential webcast is a critical part of that."
Now, with USGBC's enthusiastic backing, the LEED AP credential will be administered by a separately incorporated organization, the Green Building Certification Institute (GBCI). The formation of GBCI creates administrative independence between the LEED Rating Systems and the LEED AP credential — an important requirement in seeking accreditation for professional credentialing programs by the American National Standards Institute (ANSI).