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This article feels like it was heavily "inspired" by Jesse Schell's talk at DICE 2010:

On top of this, has everyone really being "going Gaga for game mechanics" ?

I had no idea the noted sites have had achievements. Upon noting this, I still have no inclination to venture to them.

Subject to many of the same criticisms, as well: http://www.iftf.org/node/3384