I used a proclip mount with pass-thru. I think it looks great and it works well with the ipod interface kit. The only thing that looks kinda odd is how far the cord hangs down. If it had an angled plug it would be perfect. I ran the cord through the AC vent. Here is a pic for you guys.
Here is a video I took... its was taken at night so I will have to upload a new one when I can record it in the day time.
YouTube - 08 Tundra CrewMax iPhone install