The generic technology that the three rivals are using is broadly similar, though the differences reflect trade-offs that could affect the success of their respective businesses.

ECONOMIST: Staying in touch

When assessing the merits of a generic drug with a unique drug delivery technology, the most significant risk of course is patent protection.

FORBES: Special Delivery From Depomed

Based on technology from Silicon Valley start-up Generic Media, the software can display images at between four and 10 frames per second.

CNN: Sony targets Palm with $400 PDA