I found very interesting Michael´s Mice article What's really wrong with BlackBerry (and what to do about it). As the article indicates Michael analyzes what is wrong with BalckBerry and argues why he thinks the company is at risk.
The article can also be read as a very interesting analysis on how to detect when a computing platform is dying and what to do about it.
It's also interesting to read Tomi T Ahonen response to Michael's article at Great Analysis by Michael Mace, yet is Completely Not Relevant to RIM ie Blackberry.
Javier Arias González