This (scroll down to trekking bar picture) from the Harris Cyclery site may be of interest to those who run or are setting up trekking bars. It looks like they are using road brake levers instead of MTB brake levers. I see two potentially big advantages to this:
1.) It put the brake levers closer to where your hands are most of the time, especially if they were mounted outboard a couple of inches further.
2.) It looks like the hoods provide another position in the all important neutral hand position, the position your wrists are in when you shake hands with someone that puts the least amount of strain on the joint.
Just wondering if anyone has tried this set up.