since were talking all possibilities how about speedplays and the "platformer" system.
http://www.speedplay.com/index.cfm?f...me.merchandise
walking in mountain bike shoes is easier but the speedplays w/cleat covers, aren't as bad as everyone thinks .
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2010 Kestrel RT900SL, 800k carbon, chorus/record, speedplay, zonda
2000 litespeed Unicoi Ti, XTR,XT, Campy crank, time atac, carbon forks