I though I would mention that SIRI actually works (limited) with the latest iphone5 and iOS6, possibly others.
By works, I mean that when you press the SIRI button on the phone, the car picks up the bluetooth audio/mic from your phone. It's basically acting like a hands free speaker phone, but you can instruct her to play music, make a call, send text, or search the web. Nothing displays on my Bose screen, but it's helpful at times.
"SIRI, I have an emergency - Find the nearest Starbux!" (coffee)
Just this afternoon, my 13-year old nephew was showing off his new iPhone and demonstrating how handy SIRI could be. He asked it "where can I get rid of a dead body?" and SIRI suggested a ravine, an abandoned well, and several other handy ideas to dump a corpse! (smash)