Polyester garments centric: Most fabrics around today are "cotton-like" or a Polycotton mix, so you won't have an issue finding these. Its the Polyester that makes things "sublimatable" so no 100% cotton here - sorry guys!
Must use Sublimation Blanks: It's true, you can print on almost anything as long as it has a sublimation coating on it. So picking up a box of your favorite mugs from K-mart at a discount price isn't going to cut it. Sublimation blanks are available everywhere, yet if you need help, get in contact!