CAMBRIDGE, Mass.--(BUSINESS WIRE)--Sept. 22, 2006--Biogen Idec Inc. (NASDAQ:BIIB) announced today that its analyst discussion of data presented during the 22nd Congress of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS) in Madrid, Spain will be webcast live on Friday, September 29, 2006, at 10:00 a.m. (ET). To access the live webcast, please visit Biogen Idec's homepage, www.biogenidec.com. An archived version of the webcast will be available for 14 days following the presentation.