According to a patent application by Apple published today shows that Apple may be working on radial menu for the next coming iPhone5 and iOS5 mobile operating system. There is even hing this may come with OSX operating system also. Below is an abstract from the patent application
Some embodiments of the invention provide several novel techniques for manipulating radial menus in graphical user interfaces of an application. In some embodiments, radial menus include multiple selectable items arranged about an internal location (e.g., a center of the radial menu). The novel radial menu techniques of some embodiments include (i) non-uniform spacing of menu items, (ii) the use of shading or highlighting within a region associated with an item to indicate the present selectability of the item, and (iii) the use of radial gestures for opening sub-menus and the subsequent display of the sub-menu.
Wandering how this will fit in with the next iPhone 5? You will have to wait.