I learned some calligraphy back in the seventies, eventually using it to write our wedding invitations, and somewhat using it in changing my own handwriting a little bit for a little while. It was fun, and a way to gain hand-eye coordination, play with ink, and become absorbed in a task.
This fellow, Taha Al Hiti has made an interesting video, here:
http://www.guardian.co.uk/artanddesign/video/2010/dec/21/art-of-arabic-calligraphy-video