Looks like some artistic opportunist(s) took advantage of the small time window of concrete patch mix malleability. Why does this graffito (I just learned that this is the singular of graffiti) feel so satisfying to me, when almost all of the spray painted variety feels to me like defacement? Because the sidewalk variety is rare and innovative, maybe? Monotone and modest? Quirky and tasteful?
Another form of graffiti just came to my attention, that which is appearing on the blast walls we've erected in Baghdad. I previously had a link to an image from the BBC, but it looks like they took it off of their server. I'll try to find another. It has nothing in common with the sidewalk concrete art, but is also very appealing, truly inspirational. I guess it's all a matter of context. And message. And medium. And rendering skill.
Here is an updated link to an image of the blast wall art/graffiti: www.mekka.com/log/2005/02/blast_wall_art_.html