Pa++ern is an esoteric language developped by the Japanese duo Daito Manabe and Motoi Ishibashi. The main idea is that one can create custom embroidered t-shirts using Twitter as the control interface.
The program uses sets of one character commands that instruct a sewing machine to excecute specific designs. Users can input these command codes via the Twitter micro-blogging service (@_pt), and view their results on the Pa++ern website.

Source: PSFK, Pa++ern

Today, I stumbled upon a post from PSFK that grabbed my attention. At Squidder, they apparently love augmented reality and besides an nice experiment with a car, they made an augmented reality Twitter feed shirt.

On the front of the shirt, a pattern - containing a Twitter username - is printed. When the pattern is detected by computer or phone, the Twitter feed from the corresponding Twitter user (embedded in the pattern) is displayed!

PaperTweet3d: Augmented Reality T-shirts from squidder on Vimeo.

Everybody knows Threadless: where you can buy T-shirts that gained enough votes from Threadless-members. But Yerzies is different; it prints, stiches and presses every design on a T-shirt or other garment. Although they started with a competition model, this was rejected by the community.
So if you’re the only on that likes the shirt, you’re sure that it can be produced at Yerzies!