I'm in the same boat as you with my '09. I have the OEM iPod adapter kit waiting to go in. Ordered it from United. It was kind of expensive, but once you see all the parts that come with it, you'll understand why.
Something I'm going to try to do - since my car didn't have the alarm installed, I'm going to install that as well and have the car coded for both at the same time. You also might check to see if there are updates out for your car as well...unless you don't want the update done of course.
I'm hoping to do an install video of the kit shortly. It's been a long month though.