So I didn’t do multiplayer code, but I had fun!
Today I accomplished (other than finishing up the loading/saving):
Sand and Gravel
Gold, Iron and Coal veins in stone
Trees with a trunk and a Canopy
Clouds two tiles above
the maximum build height
Controller support (only tested it with an xbox 360 controller so far)
and
Absolutely no multiplayer code at all. Oops :D