I just found out about a really cool project in Barcelona from the blog Homage to BCN (thanks Rob!). Mapping Barcelona Public Art is an achive of Barcelona street art. Katrine Knauer created a website, Facebook page and Tumblr page to give a home to her photos of Barcelona's public art. Now it seems she will take contributions from other street art lovers as well. I will have to see if I have any photos of works that are not in the MBPA collection.