I went on a walk tonight.
Transbay Tower - they have some SERIOUS equipment on-site now (for excavation) that I haven't seen before. They are really pulling out all the stops on this one. Anyone interested in machines needs to go check the site out now. Also - new solid barricade wall instead of chain link.
181 Fremont - I actually requested they move to officially under construction. They were putting steel into the ground as I walked by and I managed to snap a picture of it. Pic below:
535 Mission - topped off.
222 Second - They have finished digging there and it looks like they are ready for "next steps".
350 Mission - the below grade work appears to be done and horizontal rebar has reached the street I believe