For users with an iPhone, it always seems to be a hassle when you are reading either texts, or a webpage, or a document and you want to put the cursor over a specific word or in the middle of a sentence and either copy/paste the word or just enter a a new text there. The app I would like to have designed would be where an icon showed up in either the right hand corner or maybe middle of space bar, every time you were about to either read or edit text. The icon would be a tiny circle that would act like the blackberry scroll so that way your fingers would never have to leave the bottom of the phone and hold your finger over a word for a couple seconds and then try to adjust it.
*** I should have put this in the title of the app but I would also like to add a cursor to the app or iPhone screen like the one you would see on a computer. You could control the pointer with the same scrolling button and also scroll through pages like that rather than slide your fingers up and down