The app I want most in a future version of the iPhone OS is an equivalent of Finder on the Mac -- a file manager that supports creating of hierarchical folders and management of files. The user should be able to copy (or drag) files among folders, and between iPhone folders and PC/Mac folders when connected to other computers on a network. It should also allow files to be copied to/from other iPhones on the same network. Unlike the Mac, it should not allow the user to touch the OS files -- or maybe even apps installed via iTunes. It should just allow the user to mess with data files. The SDK should then allow apps to interact with those data files -- Create, Read, Update, and Delete them. Seems to me this would make the iPhone much more versatile, in ways that other platforms already are (like Palm and Pocket PC). As long as Apple can maintain security -- keep user files from modifying OS files, it should be secure. Sound like a good idea?