Not sure if its different on the supercharged, but on the regular v6 it is located on the driver side of the intake manifold, just below the N of nissan, where its engraved into the manifold. A black rubber hose is connected to it with a metal clamp at the end to secure it in place.
Thanks for the replies guys. I finally found an old thread that had some pics. It is in a different place on the supercharged X. The PCV is located on the passenger side valve cover toward the firewall in a plastic 45 degree tube coming out of it. It is much more simple to change than the non-supercharged model but I found that part stores have the wrong listing for the s/c PCV. The one for a Pathfinder is what works on the s/c X.