For only the second time in their history as a band, Radiohead have allowed their music to be used in an ad, this one about homelessness for the National Coalition for the Homeless (the other was this NBA commercial). The ad features "MK 1," and is pretty great-- it features a party girl sleeping on the street and looking for food in the trash, bringing home the "It Could Happen To Anyone" message. [Pitchfork]
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Actually, RH has allowed its music to be used previously for an Australian PSA; see here: http://www.everybodycounts.org/media/radioheadfan.htm
I doubt the NBA one is genuine, however. Not their sort of thing.