Functioning Form aka Luke Wroblewski did a nice summary about some recent Mobile Design Books.

And in this article from Luke, I found an interesting quote from Don Norman:

“With time, the technology matures, offering better performance and higher reliability. When the technology exceeds the basic needs of most of its customers, there is a major change in customer behavior. Emotional reaction, pride of ownership, and pleasurability all can become major selling points.”

I guess the time of technology exceeding the basic needs of most of it's customers is exactly what we are experiencing at present with telephony 1.0 (calls and SMS). Think RAZR, the LG chocolate and now the iPhone.