Here’s a few ideas.  Many of these are already done, but could do with being all placed in one place.
Introduction
What is LWJGL?
LWJGL compared to Java3D, GL4Java, GAGE etc.
Issues with LWJGL - AWT/Swing integration, hardware/software requirements etc.
When/when not to use LWJGL?
Installation
Installing LWJGL globally (into JRE dir)
Installing LWJGL locally (local dir, set library path etc)
How to distribute LWJGL (Jar, WebStart, legal issues)
Example code: Ant build script both for development and distribution
Basic Operation
ByteBuffers and how to use them.
Intro to OpenGL.
Intro to OpenAL.
Input devices - buffered and immediate access.
Example code: Rotating square, Playing a sound, Example game loop.
Advanced Techniques / FAQs
Loading graphics (raw TGA format?)
How to take a screenshot (gl.readPixels)
Executing shader programs (!!!)
Rendering text.
How to use LWJGL for 2D games.
Development
Concepts employed in LWJGL development.
How to compile LWJGL on Win32, Linux and MacOS.
Links
OpenGL and OpenAL specs, docs, forums, example code, tutorials etc.