Here's a favourite site of mine: Ace Jet 170 by graphic designer Richard Weston. Found Type Friday is an ongoing project to which you can submit your photographs of found lettering and ephemera.
I love stuff and Ace Jet 170 sets out to record the stuff I've found over the years and find in the future. Found on holiday, at boot sales, in book shops or junk shops, littering the pavement, dropped into a waste bin. Interesting stuff. And then there's the stuff other people send me. I wasn't expecting that: more interesting stuff, from some very nice people.
Thanks, Colin, for also recommending this site.