Over the past few years, the OpenBSD project has made the following OpenSSH T-Shirts:

Number 18: The New OpenSSH T-shirt
Front Back
tshirt-18 tshirt-18

The new OpenSSH T-shirt features the SSHeriff in a new adventure.

Number 9: The OpenSSH T-shirt
Front Back
tshirt-9 tshirt-9-b

Nice dark green T-shirt - back has the blowfish SSHeriff burying the old insecure protocols, and the front has 'SSH - Don't tell anyone it's free!' This T-shirt is made out of a dark green material. If you don't know what this T-shirt is about, check out the OpenSSH web page.