Asymco has published one of the better pieces of analytical work on the mobile handset industry seen on blogs in a long time. Author Horace Dediu has tracked operating profits for 8 handset vendors over the last three years, and plotted them on various charts. He shows the rise of Apple, the complete collapse of most vendors, and (surprisingly, given the bent of the industry press) the steady progress that RIM is making.
This chart tells the story in a way that words will never be able to. Profits are growing steadily at RIM, and astronomically at Apple. Every other vendor is treading water, or dying. Why do LG and Siemens even bother anymore?