>>http://www.muralmosaic.com/Cochrane.html
>
>And if you're into murals, check out http://www.muralarts.org/, the website of Philadelphia's Mural Arts program. Philly started the modern trend of putting murals on the sides of buildings (as an anti-graffiti program). Almost 25 years later, they've sponsored more than 2700 murals.
>
>To see some of them, check out:
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>http://cml.upenn.edu/murals/default.asp
>
>The project also has published two books. They're terrific.

The town of Chemainus on Vancouver Island started doing this in 1981, as an economic diversification/tourist measure: http://www.northcowichan.bc.ca/siteengine/activepage.asp?PageID=49&bhcp=1