I recently initiated two discussion groups on LinkedIn, on interest groups called CATA and Harvard Business Review.  Both discussion groups raised two questions: What caused the downfall of Blackberry? What are the lessons learned?  They can be accessed at:

http://www.linkedin.com/groups/What-caused-Blackberrys-downfall-What-37239.S.276807474?qid=69d877c2-b2d4-4716-a5b0-9573fe2664d0&trk=groups_most_popular-0-b-ttl&goback=%2Egmp_37239

http://www.linkedin.com/groupAnswers?viewQuestionAndAnswers=&discussionID=5793139819211153411&gid=3044917&commentID=5793248799954579456&trk=view_disc&fromEmail=&ut=1-EFkBdJnZgRY1

ENJOY!