What t-shirt thread are you talking about? There is a separate board called Dissigns(I think) that is all about creating stuff to put on t-shirts. Is that what you mean?
I ordered an iron-on package from Circuit City's web site. I made my own shirts with Mickey and Minnie and personalized them with my children's names and that it was my son's bday! They were very cute and cheap too! You can also add pictures to the iron ons.