Well, we lost power at work today, so after sitting around and talking for two hours, my boss told everyone to go home. Put the time to good use and tore the tongue and groove floor up, pulled most of the staples and nails which were left over from the floor, and went and bought the 3/4" PT plywood for the new floor.
All the wood is in pretty good shape except for one spot where the 4x6 was touching dirt. It's rotted a little in the one corner. I'm not going to remove it, I'm jus going to run a couple patch beams along each side up to the front floor cross beams. I'm replacing the cross beams on both the front and rear, and the side beams.
Here's the 4x6 main beam which rotted a little and needs reinforcement. It's not a good picture to show the rot, but you can see it sort of under the soda can and tape measure.