One more niggling question: InputJunkie or Input_Junkie for the url?
Just one slogan so far: "We prefer to be called Buccaneer-Americans.
Currently in the queue: "I'm a child, not an idiot" (cafepress has infant and child-sized clothing), "Do not hug from behind!" (something that works much better as a t-shirt than a button), and "Coffee-based life-form" (in a day or two, when my extra-large pen points arrive in the mail-- everything's being lettered at actual size).
I may have solved an annoyance about the site: t-shirt images are too small to make most slogans easily readable on the computer screen, but if I offer a framed tile, that gives a nice big image.