Graham Smith's Unevolved Brands project is one of my favorite derivative digital media projects. What started as a Tumblr site has evolved into a Flickr photo collection and now a proper website. Graham continues to add new unevolved brand logos to the site, noting that "Logos and brands that have strong and unique colours, as well as strong positional aspects, typically are the most recognisable when unevolved to just circles."
Graham has a solid logo design portfolio as well. And if you just need to know what all the unevolved logos actually are, you can find out here (most recent additions not included). The project and site content have not been updated in a few years, though I still find it to be an inspiration in it's focus on bold simplicity and color.