There was a thread a while about the rumor that Red Bull is building Shaun White a secret halfpipe on the backside of Silverton. Well consider it confirmed, I just found a picture on the Actionhorse blog.
Apparently it is only accessible by helicopter or sled and it cost about 500,000 dollars to construct. That's all according to Actionhorse but I believe it. Someone who lives in Silverton should poach it ASAP!!!!