Thank jk for your kind reply,i also seen this on b&o official site too!
If you want to connect an iPod or iPhone you need to have the Apple Universal Dock with the remote control and the Apple AV cable, besides the special cable. The headphone socket of your iPod or iPhone should be connected to the Apple AV cable, and to the special cable. Now the special cable should be connected to the Line socket* of your Bang & Olufsen speaker
see link
http://www.bang-olufsen.com/faq?prodid=10
i wonder if any beowold member have tried this arrangements and what was the sound like???,any pitfalls??!!