There's already a much longer thread about all of this here, reliable information starting around Page 2 and covering wired audio, Bluetooth audio, Bluetooth calls, text message display on iDrive, and iPod Out, which yes despite media errors just refers to the iPod video interface on iDrive, not analog audio or external playback control:
http://www.m3post.com/forums/showthr...=746701&page=2. Basically, if you have a car that requires a Y-cable (which an 09 would) you need to get the Lightning adapter that isn't yet available, or use a Lightning USB cable plus a separate headphone cable, but that won't sound as good because you'll be piping amped audio rather than line-level (but it should work until the adapters are available). With 9/2010 production and later cars with Combox, the standard USB cable works fine. I'm running that now.
The Bluetooth update can't hurt though:
www.bmw.com/update