I had done a tutorial on IRC on the #AmigaE channel on Freenode but I'm starting it over in PortablE using the PortablE forum on ArosWorld.org. ChrisH has commented there and helped me to get 64-bit support out of my code!

The tutorial I've done is a bitset example for the inventory class of a text adventure game. It's kind of an intermediate skill-level example but I can do other examples as well.