Rashina Hoda is a PhD researcher who has been examining how self-organization actually happens on teams. She has studied teams in New Zealand and India and identified six distinct roles that emerge when teams effectively self-organize. She spoke to InfoQ about her research, which will be published at the International Conference on Software Engineering (ICSE2010) to be held in Cape Town in May.
Doing research to see if agile defines whether programmers only do programming and pms do requirements then hand them off. This paper seems to say the opposite.