Does anyone have one?
Did you get the Curt MFG or DeLan (or are they the same?)
I called Curt MFG and they did not have anything for the wiring yet?
Oh to those that reply about researching old treads I could not find one, but there was this old thread on one of the G35/350z forum about this that I could not find anymore.

Oh I am using the hitch for a tire trailer for autox

 

They are one and the same. Here's an article I wrote on the install with lots of pics. That from my 2003. I put one on my friend's 2005 and the hitch and the install procedure was identical.

G35 sedan hitch install

 

I believe G35_TX also has a hitch he uses to pull his jetski.

 

I got mine from etrailer.com. I use it to pull a 4x6 trailer that carries my track wheels, tools, jack, cooler and ez-up tent. It works like a champ and is barely noticable.

 

I am going to get one to pull a couple of motorcycles. My maxima towed the same trailer with no problem, so I expect the G to be fine (more HP, bigger brakes, etc) I guess this is the hitch to get.