On the iPod touch/iPhone (and presumably other mobile devices as well), clicking on some links/icons within the interface can be quite a chore - as the icons appear extremely small and must be clicked precisely to work. Additionally, some of the text appears very small when viewed on such mobile devices. This can be quite a problem from a usability standpoint, as one has to continuously zoom in to click buttons and read text.

Could the PDA portal use larger font / icon sizes in general? I think this would help make it much more usable... Changing the styles used by pages depending on whether one is using the PDA view or normal view would seem to be a good approach here.