In the predatory world of marketing, there are fewer weapons potentially more potent or futile than the humble t-shirt. Without waxing on about the nuances of fine shirt design, (and considering the time) I'll defer to the LA Times' Tony Pierce who offers comments on the work of young Drupal Jedi in training Steve Krueger ~ indeed the design skills are strong in him ~ from Web Scout - T-shirt fashions of SXSW Interactive

Darth Drupal - And finally, the best T-shirt that was released at SXSW, in my humble opinion: Vancouver's Rain City Studios (sic: Raincity Studios) combined the glasses from the Drupal logo with the Sith Lord you love to hate.