This is the official wiki for Portofino 5. You can browse the pages on the right.
The old wiki for Portofino 4 is located at tt.manydesigns.com/wiki. It contains some how-to's and tutorials that, while not 100% applicable as-is to Portofino 5, can give you a glimpse at how Portofino works and how it's designed/supposed to be used.
If you know other resources about Portofino and would like to list them here, write to us!