I just read an article at http://logoorange.com that discussed 2009 logo design and branding trends. In this article, the Paris-based design studio analyzes new logos produced in 2009 for recurring design patterns. They have come up with several categories, including psychedelic pop backgrounds, origami, tactile elements, “classic modern,” pictograms, etc. One of the categories they discuss is called “arabesque.” The logos in this category use the Arabic script or decorative elements which are reminiscent of Arabic. I particularly liked this quote:

Logo designers who use the Arabesque style often have to be sensitive to one of the defining characteristics of Arab calligraphy: thick downstrokes and thin upstrokes with in-between gradations.

Check out the rest of the article here: http://www.logoorange.com/logo-design-09.php.