Delivering courses using streaming media has been an effective vehicle for online education in recent years. At San Francisco State University (SFSU), several courses are offered fully online using streaming media, and each semester over five thousand students take advantage of them. Students can view or listen to live or archived lectures online by accessing Academic Technology's Coursestream home page (http://coursestream.sfsu.edu). In this paper the authors examine the design problems and solutions of this Coursestream system, explore the approaches taken, barriers encountered, and the lessons learned. (Contains 4 figures.)