Further to my last post about coffee, I emailed myself a link to Art in My Coffee as a reminder to have a look at it later. I can't remember where I found it, but I thought it was interesting. They explain it in their About page as:
Art in My Coffee is a Tumblr blog which catalogs latte art from all around the world.
It's a series of photographs of cool foam designs done by baristas with links to the respective sites. I love the tag line "a collection of foamy awesomeness"