There are many creative ways to make SudoRoom t-shirts.
Methods to the Madness
Stencils
Stencils are the quickest, cheapest option. We can also stencil on used t-shirts as well as dresses, monitors, etc. We are planning on having a SudoRoom t-shirt party sometime in january 2014.
On-Demand T-shirts
On Demand is available at various private companies.
Here is one. I'm testing these designs. They're good for test runs, trying out new color designs quickly, etc.
http://www.zazzle.com/sudoroom
SilkScreen t-shirts
There are many people in the community with SilkScreen shops. We can speak to Rock Paper Scissors collective down the street.