I'm highly amused by yarn bombing... I still look for more knitted things whenever we're in Northampton. I'd yarn bomb my own home but I know the cats would just think it's a scratch toy for them. Bah.
There's a chick named Magda Sayeg who runs Knitta Please, and she does some amazing stuff. The following is just a very teeny weeny sampling...Magda's work, and she even has a blog if you're so inclined :)
Pictures courtesy of Knitta Please.