Add this to the pile of speculation that the iPhone 5 arrival is only weeks away: Sprint has told its employees they can't take time off between Sept. 30 and Oct. 15, notes Mashable. A company memo obtained by SprintFeed cites the "possibility of a major phone launch." The dates mesh with earlier clues and leaks, and "our best guess for the iPhone 5 launch date is still Friday October 7," writes Mashable's Chris Taylor. (Click to read how Sprint is expected to offer an unlimited data plan for the iPhone.)