If a recent patent filing is any indication, Apple may abandon the iconic wheel that has become virtually synonymous with its popular iPod music players. The company had previously explored replacing the click wheel with a virtual one as part of a touch-sensitive display. But now Apple appears to be looking at a third option: a touch-sensitive frame surrounding the display. Rather than click a physical button or press a virtual one on the screen, users would touch an area on the frame to operate their iPod.