The E-R0001 "PlayStation 3 Harmony Adapter" turned up on the FCC's website, but has yet to be formally announced by Logitech. As such, there's no word on which Harmony remotes it will work with. We've contacted Logitech in hopes of finding that out -- along with other details -- and will update you when we hear back.
[Update: Logitech has updated its blog with more details on the device from global gaming product marketing manager, Troy Petersen. You can read his comment after the break.]