There he is. He pops up during the refrain in the final minute. He fades in next to Bruce Springsteen's head, then fades out in the sun, back to Bruce.
I've just noticed this report that says Bruce will be the leadoff act for tomorrow night's Grammy Awards show. An appropriate place for The Boss. I presume he'll be performing "We Take Care Of Our Own," rather than something off of The Promise, the only thing he's nominated for (in some category about box set packaging or something).