I have barely seen them around, but a friend at work got them and is letting me borrow them for a spin. They look like this:

And here is what the website says:
   
e3 grips will help you run, walk, and jog with better balance and stability than ever before. This increased balance can result in reduction of back, hip, knee, and muscular pain while moving.

Apparently, RW calls them “Orthotics for your hands” in an article, though I couldn’t locate it in RW.com

Sounds good, right? Anyone with any insight out there?