I have a set of Looks, but I only use them on my "play" bike. Both of my commuters have Eggbeaters (paired with Specialized mountain biking shoes) for exactly the same reason you suggest. IMHO, eggbeaters are far and away the best pedal for commuting. The difference for me is that the bike with the Looks gets ridden 30-100 miles at a time, and the number of times I put my foot down on a ride like that I can count on one hand. My commute though takes me through the city (mainly Hillsboro, Tigard, Tualatin, and Wilsonville) and I sometimes have to put my foot down at every stoplight. I also run errands on my bike, and it is nice to be able to walk like a normal person when I go into a store.
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Cat 2 Track, Cat 3 Road.
"If you’re new enough [to racing] that you would ask such question, then i would hazard a guess that if you just made up a workout that sounded hard to do, and did it, you’d probably get faster." --
the tiniest sprinter