Cuberite Forum

I think world border can be added, too.

To the missing features I assume?

Yes, to the missing features list.

I believe your brewing branch was merged right?

Yes its merged.

Adjust damage based on enchantments is implemented.

I'll take your word for it But when was it implemented? ;O

Hircine (the one who was hosting BlockyLand) added some emchantments, and sharpness was one of them (about Protection im not that sure)
Test yourself if you want.

Isn't "World Border" trivial to do with a plugin? Why is it on the list?

With world border I mean the vanilla one. http://minecraft.gamepedia.com/World_border