I did something similar, though a bit more involved. I made a circuit board for the regulator (circuit diagram is attached) and hid it in my dash. I wired the output of the regulator to a cut-off USB extension cable (black wire to ground, red wire to +5v output, and connect the two data lines together, this tells your phone that it is attached to a dedicated charger, so the phone can take up to 1.8 A of current and charge faster)
Then I fed the wire through the windshield defroster vent and just connected a standard micro USB cable to the USB extension's female connector. The wire runs along the seam between the windshield and the dash so its not very noticeable, then up to the car dock, where it's zip-tied to the dock such that there's just the right amount of length available to plug it in, so it's easy to plug in at arms length.
I've got a bluetooth to aux adapter hidden in the center console that I use for audio.
Since the regulator circuit is capable of sourcing nearly 2A, (USB2.0 calls for up to 1.8A for a dedicated charger port, so it's just right) it charges the phone very quickly. It will charge 10% in about 15 minutes while using GPS, bluetooth and with the display at full brightness.
Nice!
Did you encase your board in anything, or did you just leave it nude behind your console. I also see that the right angle adapter makes a large difference in its presentation. I have seen a few free CAD programs, but wondered what you used, and did you get your boards from Radioshack or another source.
I didn't think about getting a BT to AUX adapter. Where'd you get one from, and what did it run you.
Will you be able to switch to a BT headset while its paired with the adapter? If I am by myself, it's not bad to have the call played over all speakers, but if someone is in the ride, I rather not and be able to switch to my HS.