Why have a t-shirt that counts your unread e-mails? Because you want to isolate yourself from society!
Kidding aside, this DIY project was created using an Arduino Lilypad and a Bluetooth dongle. Once done, the shirt would display the number of unread e-mails on your chest. An Android phone continuously does the checking of your inbox for new messages.
If you are making one of these, I hope you consider protecting the components from rain or spit from haters.
Source: Make , via CrunchGear