RadTech (http://www.radtech.com) has released the DockExtender, an
US$14.95 data extension cable for Apple 30-pin devices. It allows you
to dock your iPod or iPhone from a distance, or while in a case.

A small diameter, flexible cable provides connection pathways for
power, audio output, USB data sync, play controls, accessory power
and composite video. The DockExtender doesn’t, however, support
S-video output or input for recording audio. It’s compatible with the
iPhone, iPod (touch, classic, video), & iPod nano (second and third
generations).