Hi all,
I noticed that the amazing PDPortal internet multiplayer tool hasn't been used by anyone. I think it's because it's a bit hard to understand how to use (at least it was for me).
To make it a lot easier, I made a simple, open-source "Hello World"-style program for sending and receiving "Hello World" over the internet.
Source and PDX Here.
At least for turn-based games, copying the example provided here should make the online part of online-multiplayer pretty simple.
Hope this helps anyone considering online multiplayer!