http://starbulletin.com/2007/07/29/news/story04.html
Hefty had recently completed a sabbatical in Kenya, where she taught as part of an educational advisory team appointed by the U.S. Agency for International Development.
snip
Later, to Barry’s dismay, Hefty invited his father to give a talk to the class during a visit to Hawaii. But the senior Obama’s stories of tribal life and Kenyans’ struggle to free themselves of colonial rule entranced the students, replacing their early derision with admiration...
(A little bit of african black nationalism in the classroom lapped up by students and their anti-colonial teacher?)
This article does have some info about Obama’s college friends including Chandoo and one classmate who saw him as “cocky, arrogant...”