Introduction: Well as many may know over the past year or two I've been creating vBulletin products and other various creations, now I'm going to show you where and how you can learn the basics of creating a few of your very own.

"Intro":
When I first tried to create an addon, I searched google for about 2 hours until I finally stumbled across the vBulletin Manual, who would've guess?
To begin with, I suggest you have a basic knowledge of Php/MySql.

How to learn omg:
First, I suggest you learn the basic coding conventions/ect [Only registered and activated users can see links. ]. This is something that I myself did no do, therefore my coding struggled later on.
Now that you have basic convention knowledge, I suggest you learn how to create a plugin 'skeleton'. The vBulletin has done an excellent job of explaining how everything works, ect [Only registered and activated users can see links. ].
After reading through those two sections, I suggest you skim around the API and Manual for a while, then open up the award-winning notepad!

If you have any questions, I'll be willing to help you out currently...I guess.