I'm went to Oaxaca in July 2011 courtesy of the NEH to study the arrival of the Spanish from the indigenous point-of-view. I'm now plotting to return and continue researching GM corn and colonial architecture in 2013.
Oaxaca street, a set by lesliepule on Flickr.
Photos by a good friend of Oaxaca's street art in May 2008. Some of this graffiti was still visible last summer.