That is what I call matter: stuff. ^_^ Doesn’t Dark Stuff sound catchy? What d’you mean it’s lame!?
Anyways, Cosmic Variance has an article about how annihilating dark stuff may enable scientists to detect it. There is a hypothesis that these annihilating dark stuffs will create normal stuffs. Of course, it may or may not hold water. After all, that dark stuff is… well, dark, and dark in its origin, and dark in our knowledge of it. It would be cool to know what kind of stuff is dark stuff, though.