I've been a member of the mathematica.stackexchange.com Mathematica Q&A site since it started (I'm user #9). The site recently "graduated" from beta, and they gave away some "swag" to top users. Although I haven't been that active recently, I was early on, which placed me in the top 14% of all-time users, and qualified me for some swag.
So, a few days ago, I got a box from StackExchange:
Anyway, inside was a T-Shirt: