just a heads up. at this very moment my friends & I are working on installing a few goodies into our friends brand new 2008 WRX wagon. after a solid hour of sheer frustration, we are over the hedge in figuring out how to remove the dash & radio to install aftermarket equipment. we are taking pictures & making notes as we go. We will post up pics, wire color codes, and tips when we finish the install this evening.
just a quick note though - the GE chassis is NOT as easy to work on interior wise as the chassis before it.
Edit: the work is finished but we realized we didnt take pictures of a few key things so we are getting them now & will have all the info up soon. but for now - here are the wire codes for the radio harness.
Radio 12V: blue/red
Power antenna turn on: yellow/black
LF + / - white/black - blue/orange
RF + / - green - brown/yellow
LR + / - red/black - white/red
RR + / - red/white - gray/green