Permission is not granted to use the logo on any form of merchandise. An official Joomla! shop will be provided for this purpose. If you wish to create variants of the official merchandise then you should contact the shop administrator who will add your variant to the official shop.
I'd like to get a Tshirt, any news on this?
This text is from long ago, and as I remember, there were some legals involved in setting up this shop reg. payments or something..?