Looks like they're digging even deeper now, most notably on the southeast side. This is where they already have a completed portion of the foundation wall.
They had a relatively continuous line of dump trucks heading in and out of the site around midday, just hauling dirt away. Kinda surprised since it looked like they were going as far as they did during the initial excavation. I'm guessing this may be part of the drainage & utilities component...
I was going to take some before the game but I misplaced my camera since my girlfriends and I were already smashed... I managed to find it later on that evening though. I will post some pics.
After a full day of dump trucks hauling off dirt from the deepest point in the site earlier in the week, it looks they've begun working on the first part of filling in the foundation.
The base of the tower crane has been installed and it looks like they're working on shoring up the last of the rebar in the pit for the first structural columns.