There are two broad categories on this wiki:
Connecting to a TrueCraft server
Installing mods on Mojang's beta 1.7.3
If you have read the Minecraft source and cannot contribute, you can use this wiki to author documentation on beta 1.7.3 for the clean room developers to use.
Lighting
Sky Rendering
Entity Movement And Physics
Sensitivity and Mouse Polling
Vertical entity movement
Deleting the wiki page "Home" cannot be undone. Continue?