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.
Beamer presentation template.
For a modified version of this theme where the circular progress indicator goes a complete cycle and the logo and background image can be changed, use this template instead.