Many thanks to David Dean for sharing a photo on tumblr and to @Luna_mey for tweeting the link!
David Dean has posted his selfie with Keanu that was taken recently at LAX (no date was given) along with a short post on his tumblr blog. He said the following with respect to Keanu:
I was in LAX airport recently and noticed how many passengers were hypnotized by their electronic gadgets. Heads down, zombie like faces, drooling. Staring. And who walks by unassumingly? Keanu Reeves. No security or bodyguards. Just Mr Matrix.
I politely asked for a picture and had a quick 30 second chat.