I think the idea of students introducing themselves in the forum is a great idea. I personally do that in the real-time class with my students on the first day of class. However, if I require, as their first assignment, to write a brief bio about their academic background, career, or experience, I am afraid that some will feel less than others. For example a housewife returning to school may feel shy sharing her academic background with others, who may already have advanced degrees. What do you think?