GPS as paintbrush and exercise coach

The NYTimes published a lengthy piece on GPS as a tool for running. I know that if I am ever going to get back into running it is going to take something more than GPS. But the Times talks to an artist who runs in the shape of drawings - he draws with GPS. This isn't a new phenomenon (gpsdrawing.com has been online for years), but the ubiquity of GPS is changing things.

For instance, one runner used it to raise money for charity. And the article points to Arizona researchers fighting childhood obesity with GPS:

As part of a $1.5 million grant from the Department of Agriculture, the researchers plan to use GPS drawing to help fight obesity by luring children into fitness with technology.

But one ne'er-do-well turned Ft McHenry into a big flower.