I'm currently putting a bunch of trips together to kayak and raft in Tibet this summer. Due to the Chinese government relaxing their travel restrictions it is now possible to boat in Tibet with minimal permits and logistics. I have been boating there for the last 3 summers and have begun to train 5 local Tibet guys in rafting and kayaking.
If you want info on kayaking in Tibet (either independantly or commercially) beam me an email at email@example.com
You can also check out some images from some of our trips at www.windhorsetibet.com
Go to "RAFTING" then "PICTURE GALLERY"