I ordered the simple Brodit iPhone 4 holder (Standard Padded Holder without case #510164)
and the vent mount (ProClip Center Mount #854549) at Proclip USA.
If I need to charge (rarely), I plug in the white Apple cable. (I have it plugged in at the office and at home).
I wanted the phone to mount a bit lower and do not mind it sitting in front of the vent, also looks clean.
Photoshop for the lack of the mount (backorder) and the Jeep (March):