The TomTom iPhone car kit, which we’ve talked about before, has landed in the Apple online store at the hefty price of $120. While it’s not in stock yet, this gives the chance for people to pre-order if they want.

The kit is designed to attach your iPhone to the car’s windshield and comes with an extra GPS unit built into the kit itself. TomTom claims using the hardware with your iPhone provides a more steady and accurate GPS reading.
The kit doesn’t include the cost of the TomTom iPhone app, which is an extra $99 (iTunes link). What will be interesting to see is if the GPS unit in the kit will work with other, perhaps less expensive GPS apps (ie, provide an enhanced GPS connection to something like MotionX GPS Drive).