Linux and Open Source stickers, ideas?

[pennadl]

Hello guys, I'm part of a group of unix lovers who run a stickers online store at http://www.unixstickers.com

We currently have several sticker models in our collection, and many others are coming soon.

We will be very happy to hear some ideas about new stickers related to unix/linux/open source.

Any preference? Thank you, Stefano.