I think that it could be useful to have a simple app that does only one thing…
It dial the number of your most used contact… your girlfriend or your mom… one tap and it dial…
It must have a method perhaps in the settings panel to set wich of your contact is your favorite…
Something like speed dial…
Don’t know if it already exists…
[UPDATE] It already exists… it’s called QuickDial (iTunes Store Link)
I think that application that use a drill down interface could be made more efficient implementing a two-finger scroll that do back-forward action… If you are in the deail of a contact you shoud be able to go back to the list with a two finger scroll up… easier than trying to find the button in the upper left corner that usually do the job… and if you dont take off the screen your fingers you could also go back to the detail…
It could be useful more with applications that show deep hiearchies (more than the canonical 3 level hierarchy)
Perhaps some kind of gesture could be implemented to change the position of an item in a hierarchy… think about something like spring loaded folders in Mac OSX Finder…
You tap on an item to select… add a second finger to start the move operation… drag left to go up on or more level… drag up or down to scroll in the upper level … drag right to enter another branch of the hierarchy and release your fingers to drop the item where you need it to go…
Feasible? don’t know… if someone wants to try to implement it…
