Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
ive just set caps lock to no action in the keyboard prefs as i never use it. i havent heard of an app that enables the caps key to work like on the new keyboards but theres a sweet app called CapsWarn that plays a tune when you hit caps and continually plays it if you keep on typing.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.