"Learning," writes Ellen Wagner, "is a deeply personal act, best facilitated by relevant, reliable and engaging experiences, yet many teaching approaches still rely on more impersonal 'command and control' models that include an instructor in charge, specific goals to be met and criteria to be mastered." Mobile learning devices stand poised to change this, she writes. "With mobile technologies, training now accommodates people instead of people working to accommodate training." Well... except for the size thing. And the proprietary technology. There is a lot of opportunity for mobile learning, but it is not without its pitfalls.