Check out yarn bombing Seattle-style in this article: downtowntraveler
The urban art is by Suzanne Tidwell and is featured throughout Seattle.
The author asks your opinion on which you prefer--Seattle's...
or New York City's "lamppost "cactus" pictured here:
Apparently the votes are in Seattle's favor because yarn is more environmentally friendly. With our rainy climate, though, it's been suggested that plastic ties (recycled and bio-degradable, of course) might be more appropriate.
See more of Tidwell's fabulous street art here.