Stephen Wellman from Information Week summarized talk by Google user experience designer Leland Rechis recently. You can find the write up at the InformationWeek's Mobile Weblog
Here is the excerpt:
"Wellman breaks down mobile users into three behavior groups:
A. Repetitive now
B. Bored now
C. Urgent now
The bored now are users who have time on their hands. People on trains or waiting in airports or sitting in cafes. Mobile users in this behavior group look a lot more like casual Web surfers, but mobile phones don't offer the robust user input of a desktop, so the applications have to be tailored.
The urgent now is a request to find something specific fast, like the location of a bakery or directions to the airport. Since a lot of these questions are location-aware, Google tries to build location into the mobile versions of these queries."
The model looks good. The only change I would make is renaming "bored now" with "available now". "Bored now" suggests need to be entertained. "Available now" is much broader. It encompasses entertainment but also covers “I have a spare moment, I better use it productively” mindset.
The three behavioral models suggest three different categories of applications supporting specific user needs.