1 X Semana is kinda like a Spanish language version of Drawer Geeks (prev.). From the site: "We are a bunch of colleagues who every week propose a character, concept or idea to be drawn. In this Blog we share the results of our exercise." The site is relatively new, but so far, this result in the "Sea Monster" challenge is my favorite. Via.
Things Look Like Things is an interesting photoblog concept; the author spends his flickr-browsing hours finding visual similarities between images & creating themed sets, usually with a small amount of accompanying text. I'm doing a terrible job of selling it, but the results can be really compelling. Via.