Solution: Consolidate any devices drawing power from a USB port to have its own port.
What I used:
12v to USB adapter (See end of post for information on picking out an adapter)
22AWG Stranded wire or better
Fuses (stock fuses didn't fit in AAC)
Dremel, soldering iron, etc.
Finding a fuse to tap into was easy. Since I have a Prerunner I could tap into the 4x4 circuit without affecting anything.
AACs have two fuse slots, one for the primary circuit you're tapping in to and one for the circuit you're adding. It isn't usually well documented which slot is which, so you will have to do a little figuring on you're part. (It is important that you don't use the wrong slots!) I would suggest that for this mod you try and use a 3A fuse for the USB charging circuit and use the standard fuse rated for the original circuit in the second slot of the AAC. Also note that the fuses that normally fit in the truck WILL NOT fit in the AAC.
I gutted a 12v to USB car adapter so that I could fit it in one of the buttons below the radio. I was getting impatient as my dremel was low on charge so it's not as prefessional looking as I would have liked.
Another picture showing the amount of wire used. The red crimp shown is where I connected the ground later.
The most time consuming part was feeding the wire through the back of the dash.
Once that wire was complete I went back and connected the ground to the radio mount.
Then just push the button back in.
The USB port is actually sitting flush unlike how it was in the earlier pictures. I could have taken it slower while fitting it and make it look more professional, but due to it's position you don't pay much attention to it. This mod works great if you have a mp3 player since it's right next to your Aux jack, but it could be placed anywhere.
If you plan to use this with an Iphone or Ipod please take note of the following:
CAUTION - Many of the USB Cig Lighter Adapters do not provide enough current to charge your iPod/iPhone unit(s). The one I have puts out 400mA (.4A) and it will not charge my iPod Nano. The iPod/iPhone needs at least 1Amp to charge. When you purchase an adapter for this mod, make SURE it is rated for at least 1Amp for the +5VDC output.