I've had a blast tearing apart the damaged areas of the boat.  Looking at the shattered wood, figurin' and fussing. Here are some pics of the process.

Round one of peeling out the damaged wood.  The hit was about 1/4 inch in front of the sternmost thwart.  Good thing too! Otherwise this would be a picture of me sticking my head through the hole.

This is close to the final round of wood removal.  The plywood in the thwart was shattered into little 2mmx2mm cubes.  I left the sides of the thwart in place because they were undamaged and I didn't want to remove the undamaged fillets. (it was a pain to fit the patch though!)

Patches, glass and fillet.

Ready for primer.  The purple is the fairing compound.  Its Raka's phenolic micro balloons.  I like it a little better than the microlite from West.  Raka's seems to sand smoother with less air bubbles and slightly easier sanding as well, especially if it is well cured.

The color match is pretty good.  Hopefully once I clean up the rest of the floor the lines will blend.

The final touch.  The Zizumara has a "tramp stamp"!  Just one of the many reminders to be humble.