Scientific American was acquired by the Nature Publishing Group (NPG) in 2009. NPG is discontinuing access to the Scientific American Archive on EBSCO on May 31, 2010. UC Libraries have decided not to license Scientific American on the Nature.com platform. Economic factors have made this decision a necessity.
More detail is provided on CDL’s Challenges to Licensing Web site: http://www.cdlib.org/services/collections/current/challenges.html