usability on mobile phones
I thought @jim and @paul and maybe others would find this article interesting, Mobile Web 2009=Desktop 1998
Summary:
Mobile phone users struggle mightily to use websites, even on high-end devices. To solve the problems, websites should provide special mobile versions.
Apple seems to be forcing that with native apps. The problem with native apps is that they are iphone specific and soon you need native apps for every phone type out there.