"Microsoft's Smartphone initiative took a hit late last year when U.K. handset maker and longtime Smartphone supporter Sendo abruptly dropped the Microsoft operating system for one made by a rival. And last month, RealNetworks outflanked Microsoft to supply video streaming capabilities to Vodafone—the world's largest mobile phone company and part owner of Verizon Wireless. In an almost prescient move, before the Vodafone news broke, Microsoft renamed its Smartphone software Windows Mobile, combining it with its more successful Pocket PC operating system under the new moniker."
Although the article is not 100% on mobile and mobility issues, the author look at Microsoft track of failures or almost failures - including mobile devices. Interesting reading from the Seattle Weekly.