These interesting pictures of soviet-era anti-drinking posters [via Boing Boing] reminded me I wanted to jot down some of my favourite image sites for future reference.
http://www.fotolog.net/realnameunknown/ (my mate Dave takes funny pictures)
http://www.woostercollective.com/ (street art)
http://www.sxc.hu/ (stock exchange - via ChrisAn)