I haven't read the whole thread ('net is really slow here today, maddening) but I unclip my left though I'm right-footed because I want my right leg and right hand controlling my bike when I push off.

But I'm not sure if being right-handed necessarily means you're right-footed. Which foot would you pefer to use to boot a football across a field? In my case definitely the right, therefore both right-handed and right-footed.