More first hand reports are being posted our main forum tonight, saying that Public Enemies filmed on Roscoe and Clark today, inside scenes in early afternoon, outside scenes just before 8 PM local time. Also preparation went all afternoon at the California Clipper where the extras showed up around 4pm. It's assumed that after Johnny Depp left Roscoe and Clark (about 8:30 PM), they were headed to the Clipper. Then Depp reportedly left the area. Further reports are in that he is back on set.
Go here to read this and other reports as they are posted.