SC/MPC:
WASD: Movement
Space: Jump
Leftclick: Delete Block
Rightclick: Place Block
B: Choose Block Type
Scroll Thingy on Mouse/Numbers: Select Block (From GUI)
F: Increase/Decrease Fog
Esc: Options (Frees Mouse)
Enter: New Spawn Point
R: Respawn
T: Chat (MP Only)
Tab: Player List (MP Only)
Survival:
WASD:Movement
Space: Jump
Leftclick: Delete Block/Hit
Rightclick: Place Block/Use Item
Scroll Thingy on Mouse/Numbers: Select Block (From GUI)
F: Increase/Decrease Fog
Esc: Options (Frees Mouse)
Indevelopment/InfiniteMapTest (Paid Members):
WASD:Movement
Space: Jump
Leftclick: Delete Block/Hit
Rightclick: Place Block/Use Item/Furnace Options/Crafting Table Options
Scroll Thingy on Mouse/Numbers: Select Block (From GUI)
F: Increase/Decrease Fog
Esc: Options (Frees Mouse)
I: Open Inventory
Crafting Guide: http://www.echidnatribe.org/Minecraft/crafting.php
You can always change the controls in the options menu.