theworldismycanvas.com

I admire any campaign that goes the extra miles, this is one of them, not only there is a real offline event linked to the online entries but the content for the site is well researched and shoot.
The 'Submit art' section should have been bigger so people could have really spend the time using the streets as guides, perhaps googlemap could have been involved?
The usual sharing tools are here but is myspace still worth having? at the time of visit http://www.myspace.com/positionart only add 9 friends (including Tom).
Have a look at 'the work of Stavros': http://www.flickr.com/photos/23651654@N03/map/ it's a great use of Flick, doesn't cost a lot to do and add depth to the site. http://www.theworldismycanvas.com/
P.S: reminded me of http://www.animalsontheunderground.com/