When I bought my '06, UConnect could be purchased as a dealer installed option. I kept looking for factory installed as the buttons are integrated into the rear view mirror. A cleaner look in my opinion. If I remember correctly, the dealer installed version was around $300 + labor.
Installation aside, I love the UConnect. Automatic muting of the tunes and caller ID right on my stereo. I don't use the voice dialing much as it can be easliy confused by background noise.
Hope this helps.