OpenBSD t-shirts!
Shirt #1, for USENIX: Full-color rendition of the OpenBSD daemon on a white, pre-shrunk, 100% heavyweight cotton Fruit of the Loom t-shirt. Available in sizes L - XXXL. monkey models Shirt #2, for DEFCON: White wireframe rendition of the OpenBSD daemon on black, moss green, and navy Hanes Lofteez (thick, heavyweight cotton) t-shirts. Available in sizes S, L - XXXXL. Dug model

All profits go toward keeping the OpenBSD project afloat.

And don't forget to buy the latest OpenBSD 2-CD set while you're at it! Check out the WebServer Online review of OpenBSD...