Canon USA CPS has announced that the Canon EOS 5D Mark III is now availabile for evaluation loans:
"EOS 5DMarkIII cameras are available for evaluation loans to Gold and Platinum level CPS members on a first come first served basis. Subject to the same rules and regulations applied to all try before you buy evaluation loan requests. cpsloan[AT]cusa.canon.com"
It is worth the membership cost just to evaluate this camera. Learn more at http://www.usa.canon.com/cps.