SendStation Systems (http://www.sendstation.com) has released what is
says is the world's smallest Mini USB-to-iPod adapter with integrated
Line Out jack: the US$29.95 PocketDock Line Out Mini USB.

SendStation's President Andre Klein says that Mini USB has become the
connectivity standard for portable electronic devices. The latest
addition to the PocketDock family of iPod and iPhone adapters
addresses that: now you can sync and charge your iPod or iPhone using
the same cables, wall or car chargers found with digital cameras,
portable hard drives, GPS devices, PDAs and many more. Additionally
the integrated 1/8-inch (3.5 mm) Line Out jack offers pristine audio
quality for connecting the iPod or iPhone to your home or car stereo
or DJ equipment.

The new PocketDock Line Out Mini USB comes in black color, weighs
four grams and with 7 by 25.5 mm has the same footprint as Apple's
iPod plug, so it fits through the dock connector opening of any case.
Like all SendStation accessories with 30-pin dock connector, it's
"Made for iPod" certified.

SendStation has also redesigned the included set of slim audio
cables: the RCA (Cinch) plugs feature a flattened top to accept the
thumb, which, by slightly turning while pulling, helps to unplug them
easily.