+1. Case in point: Today I was thinking about a problem: "Maybe I need a something like a "reduce-map" function here; maybe that would be the right metaphore for what I want the program to do here." I wanted to know whether this thought had any currency, so I googled program "reduce-map":

http://www.google.com/search?hl=en&q=program+%22reduce-m...

And got back a slew of map-reduce tutorials.

Still don't know whether that "reduce-map" idea is a dead end.