This document discusses how street art and tagging can be used to send messages and raise awareness. It suggests that the more stickers or tags that exist, the more important and powerful the message becomes. The document then asks how outsider artists, startups, or social media-savvy doctors can use street art to communicate with people. It discusses how Health 2.0 uses technologies like search, wikis, blogs, and online communities to enable participatory healthcare. The document envisions a health data movement uniting with a patient street art movement to find new ways of engaging people.