I finally joined my first Flickr group. It has taken a while but I hadn't seen a group that suited me (hadn't looked for one either to be honest). Then I came across the Rusty and Crusty group and it seemed a perfect fit. See some of the great pictures from this group here. This group is one of Flickr's largest (over 16,000 members) and has some really interesting photos as corroded subjects usually have such amazing character.