Ubuntu members are entitled to Ubuntu business cards. Once you have successfully completed the [http://www.ubuntu.com/community/processes/newmember membership process], you will be added to the [http://www.ubuntu.com/community/processes/newmember list of members] and are entitled to carry and use Ubuntu cards.
You need to print your own cards, using this [attachment:ubuntu_business_cards.tgz artwork] or [attachment:free_ubuntu_business_cards.tgz this free artwork]. Note: Arial is not exactly a free font; it is part of the msttcorefonts package available from the Multiverse repository.
Note that this artwork is in Adobe Illustrator format, as we have found that most convenient for professional printers. If you have the ability to recreate this artwork in an open format, please do so and update this page accordingly.
Update: Uploaded an [attachment:UbuntuBusCardFA-2.svg SVG export] of the Illustrator file. This is fully editable in, say, Inkscape. Please let [https://launchpad.net/people/trappist me] know if you find any problems with the file (not for support - I know next to nothing about SVG. I just exported it from Illustrator.)