This video was put up by tobu2181 a week ago, so I'm not sure if really qualifies as news, but none of you beat me to it . This is the former set K109 based at Katsuta, the first to be refurbished and renumbered as 1000 subseries; previously, all 651 series cars were 0 or 100 subseries. I assume that as it will be running on Akagi, Kusatsu, and Minakami services, some 185 series sets must be destined for Nagano Depot (that is, the scrap line). :( I haven't read how many E651 sets will be refurbished.
Original set K104 on test run north of Tokyo: