Abe has announced that the source code for zigGIS is now available (governed by the zigGIS EULA). It can be found at http://www.obtusesoft.com/source.aspx.
Additionally, there is now zigGIS apparel available at http://www.cafepress.com/obtusesoft (just because it’s fun…and a little geeky).
No, there is not an option to have the source code printed on a shirt.
Enjoy both….