Hi Jamie, I have just been reading this http://op111.net/53/
All about Child Themes.
Thought it would make a good basis for a Tutorial.
Nice list of useful links near the end.
Have you considered a links section on the PP site, each link with tags so a simple search could be available.
Members of the academy could then aggregate their recommendations!
First thoughts on Canvas V5 are that it looks good – but has a few kinks that need sorting out. Version 5.0.2 has just come out which looks a lot better. Im personally waiting a few more weeks before upgrading on production sites.