Super Plastic Forming by Kenisis tubing is the latest in technology for tubing. Its carried out in High temperatures on aluminum tubes to make them pliable in any shape or form. SPF tubes are a great alternative to the more expensive Carbon tubing. Comparable in weight and performance without the short lifespan and price of Carbon SPF tubing is also recyclable!
More info: Welcome to Kinesis Website
Here is a Jamis Nemesis a 650 (bigger then 26 and smaller then 29″ wheels) that uses its tubing!