Links

I gathered the information to make a board from various places...

General Info
Soo much information on board making here, search before you ask...
Swaylocks

Kite board forum board builders

Paul Jarvis made a nice board using PVC foam rails, Corcell foam and epoxy...
Has great information and good, clear description of the process.

I want to start working with carbon fiber, figure you could make a fin easily using this technique...
Carbon Propeller

Plywood boards
Got a few good ideas here:
DIY Kiteboard

This guy is classic, really focuses on simplicity - flat ply with no fins... innovator and gave me loads of ideas.
Plywood boards

Videos
These guys have some good instructional videos on t-nut inserts, glassing, etc.
JamestownTV

At some point I'm going to make my own fins. (You tube fin making video)