If ya don't wanna go all-in, Inov8 is making some 'real shoes' that imitate the Vibram 5-fingers.
I have a few friends that wear em and like em. I've never tried em.
Basically the thought is you run on yer midfoot and forward, right? Natural shock absorbtion from all the bones in yer forefoot.
Seems to work for whatever Mexican Indian tribe that runs and runs... May work for me/you too!
Look like shit tho.
Least in public when yer not running.