I am hoping to get my hands on a happy hackers keyboard for mac in the not too distant future. In preparation I have modified caps lock to act as the control key as this is the position on the Happy hackers keyboard. This actually makes a lot of sense to me as I find using control in it's default position is a bit awkward. To try this out all you need to do is open sys prefs. Go to keyboard and mouse. Select the keyboard tab. Hit "modifier keys" and then change the action for capslock to control. Try it you might like it.