iPod options for an E90 330

[The_Gza]

Any idea what's required to connect an iPod to a E90 330i Coupe??

My mate's got one but it only has an aux type jack input - I'm guessing this isn't enough to display the iPod info on the display screen in the middle of the dashboard? Is there a retro fit solution which works, or is it a matter of getting a genuine BMW kit? Found this link on eBay but seems to include the steering wheel buttons which he already has: http://cgi.ebay.com/ebaymotors/BMW-Genuine-E90-E91...

Thanks!