From: http://www.useit.com/alertbox/mobile-ux-guidelines.html
"People want me to give hard and fast rules: don't show more than X menu items; don't write more than Y words per page; nothing should be more than Z clicks from the homepage. Sadly, UI design doesn't work that way. Usability questions seldom have a single answer. Rather, they are qualitative issues that specify the direction and nature of inevitable design tradeoffs."
