Usability: it ain’t easy
“Which is why some industry observers insist that the place to start in making mobile services easy to use is to focus not on technology or even user surveys, but on user behavior. In other words, it pays to understand what people do with their phones, whether the phones were intended for that use or not.” (Author: John C. Tanner, Source: TelecomAsia.com, Props: Usability Magazine)
This article rambles all over the place but many good points are made. Good market insight, especially regarding cell phones.