http://www.plime.com/plime-com/en-ushttp://www.plime.com/plime-com/http://www.plime.com/plime-com/l/61224/1/NSFV - in a dirty mind]]>http://www.plime.com/plime-com/l/9190/1/http://www.plime.com/plime-com/l/36390/1/http://www.plime.com/plime-com/l/36529/1/
A bit NSFW.]]>http://www.plime.com/plime-com/l/33947/1/<--(that's not the logo I'm referring to)]]>http://www.plime.com/entertainment/l/61991/1/http://www.plime.com/world/l/41592/1/http://www.plime.com/world/l/5787/1/http://www.plime.com/plime-com/l/2414/1/http://www.plime.com/technology/l/3276/1/http://www.plime.com/arts/l/25513/1/http://www.plime.com/plime-com/l/52126/1/http://www.plime.com/plime-com/l/40267/1/http://www.plime.com/plime-com/l/14108/1/http://www.plime.com/plime-com/l/36098/1/Batman logo from 1939 to the present.]]>http://www.plime.com/plime-com/l/27812/1/http://www.plime.com/plime-com/l/16331/1/http://www.plime.com/plime-com/l/60222/1/
There is a logo "find the real logo quiz" and a "what does this logo mean" quiz]]>http://www.plime.com/technology/l/57998/1/http://www.plime.com/plime-com/l/45726/1/
blogspot has more here.]]>http://www.plime.com/plime-com/l/31183/1/
It comes from the building materials used for the first incarnation of the web crawler that indexes the internet.

Bornbad's post here made me think of this.]]>