A simple vertical business card design that uses both sides of the card. The back side is used to display a logo and QR-code while the front side contains all of the usual information (name, contact information...).
This Blackboard beamer theme and template was created by Kazuki Maeda <kmaeda@users.sourceforge.jp> for Japanese presentations, but can be used for English (or other European languages) presentations as well. It has been modified to work with XeLaTeX.
p/s: The blackboard background was drawn with TikZ; the code is also included in the template.