Razer Pro|Type actually combines the Razer Tarantula with an iPod dock and comes in the appropriate white color. It will be available staring April 6th and will set you back $130 USD. It has media buttons, 10 programmable keys with backlights, two USB ports and a line-out jack, and 10 customizable "profiles" for setup switching.
_130$ ack ack

/http://www.techpowerup.com/Razer%20Pro|Solutions