This tutorial covers everything the budding flash developer needs to know about making multiplayer games. I wrote this tutorial to be EXACTLY what I would have needed when I started making multiplayer games. Instead, it took me about 1.5 years (part time) to learn and research all the finer points of multiplayer games, especially for flash, where the market hasn't matured yet.
This tutorial should be helpful for everyone, from the interested non-programmers to veterans. Take a look through, you may be surprised at what you find.
Due to the fact that I cannot host examples, etc. remotely, only part of the tutorial is hosted here. Please continue to the playerio site to get everything.