When it's about designing a notebook, it's not always easy to combine the tradition and technology. Probably the best possible solution so far came from the folks at DODOCASE - San Francisco based company - well known with their iPad cases and tablet covers.
It's called DODO NOTES - Unique die-cut tray to nest the iPhone. A colorful elastic strap holds the device in place and when the phone is out it can be used to store other loose items such as business cards, cash, and a pen or stylus. Available in red, blue and classic black. iPhone 5 and iPhone 4 is in stock. Samsung is coming soon.