OMG!!!! I got my shirts from The Lollershop.
The cube is actually a clock but you cannot see it in my picture due to it being sort of shiny and the flash effect from OS X Photobooth. I also got the Banhammer, Typeface and Casual Friday shirts.
I was so happy with this Time Cube shirt that I decided to put it on and give a call to Gene Ray, the visionary who first revealed the Time Cube paradigm. It starts out real weak but gets pretty good. He says that you've got to put your pole in a hole, and calls for acts of violence against teachers who refuse to profess the truth of cubic time!