Click here to visit the thit! site and register on the first page with the invitation code zt4E74 (Uploading a picture is optional and I just put my phone number as 555-555-5555). Then on the next page just fill out the form to request your free t-shirt.
*In case you’re wondering what Thit! is, it’s supposed to be a new social networking site. You can read more about it by clicking here
Image Credit: Thit!