Question:
Is Minecraft Worth Getting?
Option 1: Yes!
votes: 4
Option 2: No!
votes: 2
Option 3: It's Alright.
votes: 0
Option 4: Nar, It's not great.
votes: 1
http://www.minecraft.net/
Answers all your questions except the last two, I guess.. but those are self-explanatory once you get the game (icon on desktop.. option to enter IP upon clicking multiplayer..)