This was a project done a few years ago that I find very motivational. The site is a great example of networking and map making. Cracks in the Pavement was started in Austin, Texas, in June 2004. The project featured site-specific works by 15 Austin-based and international artists both in Austin and in London, UK and was presented as part of the London Biennale 2004

http://cracksinthepavement.com/