It's the Divide Social club, a design company run by Milo and a group of his friends.
http://dividesocialclub.tumblr.com/
http://twitter.com/dividepictures
http://www.myspace.com/dividesocialclub

From what I can gather it stands for Divide Social Club and it's some kind of production company started by Milo and a group of his friends. You can find them on here dividesocialclub.tumblr.com/ as well as myspace and (I believe) twitter. Hope that helps.