Yarnbombing:
Artyarn.org: “a collaborative fibre arts project”
Victoria and Albert: great page of knitting links, including these marvelous pictures of items in the collection, and a very good links page (knitted Elvis wig, anyone? Historical patterns?)
Casglu’r Tlysau/Gathering the Jewels: decorative knitting sheaths
Open Directory: page of links
World wide knitting in public day
I found one in Brussels!
http://www.flickr.com/photos/ohbara/4008284310/