Top's done.

Flattened one side by hand.  Planed the opposite side to an even thickness.  Trimmed to final width and length and cleaned up the edges.  Took 2-3 hours.  I'm not very efficient at hand planing yet.

Next up: Make a template for the leg / web mortises so they're all in the same spots on each leg.  Drill the backer boards and top in place.  Get started on the drawer webs!