I have some experience of teaching a course in Mathematics for libearal arts and social science students. It was called last year "the beauty of mathematics". 
Here is a [blog post about the course][1], and the [course page][2] which contains all the presentation (in Hebrew). 


  [1]: http://gilkalai.wordpress.com/2010/02/24/the-beauty-of-mathematics/
  [2]: http://gilkalai.wordpress.com/%d7%99%d7%95%d7%a4%d7%99%d7%94-%d7%a9%d7%9c-%d7%94%d7%9e%d7%aa%d7%9e%d7%98%d7%99%d7%a7%d7%94/