In a move that is obviously a calculated tease, a couple of employees, one from LG and the other from Google, uploaded a series of pics to Google+ that had exif data indicating they were taken from the Nexus 4 phone. One of the posts was taken down, but the shot above was rescued beforehand. This new info, plus the rumor from last week that came from a Carphone Warehouse database, seem to confirm that the LG Nexus will be the Nexus 4. Of course, it still could just be an internal codename. We should know something concrete very soon.
Source: AndroidPolice via Google+(1) & (2)