I was thinking more about this thread and wanted to ask all you users of these "cool User Interface" Smartphones like the Blackberry's, iPhones and such.
Focusing strictly on GTD (the literal), isn't this so much quicker and easier to use (see my screen-shot of my Treo task list). I have what I need right there. The notes re such are right there. Adding a new task is a piece of cake. Do the flashy UI's allow this?