The most commonly used program by many of us is email... whether it is Mail or Entourage or whatever, yet we dont moan and groan to Apple about recognising that its interface should be/could be a killer... by making it like Finder with the ability to organise folders like "Folder view" or any other view we can in Finder, by coloring and renaming folders and emails by simply clicking and retyping, by opening and moving email just as if they were word docs between folders and even to the "real desktop" or documents folder, where they would be accessible to say rtf or word programs and stored and sortable along wth everything else. In short, the most common program we use still suffers from the old computer interface problem of 20 years ago of inflexibility. Why not update it to be as Friendly and as flexible as Finder, to interface with the real Finder easily and to be able to access the 10,000s of mesages we keep these days in relative confusion? .... Just a suggestion for a killer app!