"Meanwhile, I finally figured out a good UV mapping for taking flat-photo textures and wrapping around the ends, sides, and corners of the table so it looks good."

 

It sure does, Ive never used wooden tables (in 3d pictures) because all their borders looks so weird, your example is the first one ive seen that looks belivable.

 

Are you going to put that table of yours (with the mapping and shaders shown) up for sale?