After having my Alpine head unit rendered useless in the iPod realm with 2.0, I was on the lookout for something that would let me control my ipod easily, charge the iPod, and require little wiring. I ended up purchasing the Kensington LiquidAUX Deluxe from Amazon.
http://www.amazon.com/gp/product/B0011UK2HO
I got it today and after brief use, I am absolutely THRILLED with it. The holder plugs directly into your cig lighter, and has a definite wiggle to it. Luckily, the wiggle doesn't seem to show up while driving on normal roads. Plugging in was a breeze. Your iPod/iPhone passes audio through the dock connector, so all you need to do is connect the Kensington's audio plug to your AUX plug in the car stereo.
When you dock your iPhone/iPod, you don't see any messages that say it wasn't designed for an iPhone, it just starts working. Did I mention it also includes a wireless remote that hooks onto your steering wheel?
Overall, I can't find much wrong with this thing, except I would have liked it to be a little stiffer, because over rocky roads I can possibly see this thing moving around.
If you are looking for an all-in-one solution to charging and playing your iPhone, I seriously suggest you look into the Kensington LiquidAUX Deluxe. I was at the Apple Store today and saw a spot on their wall for it, but it was out of stock.
Good looking out, that product looks awesome. But based on your review and what another person said, I'm still a bit iffy about the whole wiggling thing.