VG247 has it on good authority that Sony has named its PS3 Motion Controller "Arc".
The information comes from a concrete source speaking under conditions of strict anonymity.
Sony has never said what the wand-based system is to be called, admitting only that it was once named Gem, a past internal codename inadvertently outed by EA CEO John Riccittiello at the UBS Global Media and Communications Conference last month.
The Motion Controller consists of one or two wand devices, each topped with a trackable ball. It works with PSEye.
We saw PlayStation's tech guys running the system at Develop last year; get the news from that here.
We've contacted Sony for comment.
Update - SCEE: "We don't comment on rumour or speculation."