I'm in the same boat. I have sent google 2 emails now with no response. Is there another email to contact shipping specialists? I have just been using the link from Play.
Does your package "last location" show somewhere in OR, or is it elsewhere? I filed a lost package claim as well and its shows a last location of where I assume the closest UPS facility is to my location.
I just put in Google's Mountain View address from my receipt and was able to produce a trace as well. It shows a trace to the closest UPS facility, so its either there, or they are working backwards.
I know the specs are not exact (with the Nexus 4 being 2mm longer and 0.6 mm thicker) but has anyone tried any of the Optimus G soft rubber cases with Nexus 4?