An anonymous reader writes "A paper was recently published about Shift at the Computer Human Interaction Conference earlier this month. The authors [Daniel Vogel, a Ph.D. candidate at the University of Toronto and Patrick Baudisch, a research scientist at Microsoft Research] developed the technology to solve several problems with mobile-phone touch screens, and also created a short video with a demonstration of how Shift works.
Shift builds on existing technology already developed and known as Offset Cursor. Offset Cursor displays a cursor just above the spot a user touches on the screen. That allows users to place their finger below the item they wish to choose so that they can see the item, rather than hiding it with their finger."