UPDATE (4/23/02011)  Long Now’s  Laura Welcher found another instance of Long Now graffiti at the BART track support along the Ohlone Greenway in Berkeley (pic below):

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We heard last week that some “Long Now Graffiti” showed up on the sidewalk out in front of the Pixar animation studios in Emeryville California.  A friend just sent in pictures of it…  I assume no one wants to come forward to tell us more about it, but I would really love to know why it only goes to the year 10,000.  Why not 12011?

… and this one in Berlin: