Great idea, Tom.
Maybe start with a 101 - it would be cool to build up a resource. Not everyone has the same level of experience.
Personally, I'd be interested in live mixing tips, monitoring options, basic pros and cons between speakons vs jacks, etc, positioning of components, etc.
Come to think of it, Alan has an excellent 101 on his site (which I've referred back to to dozens of times). With his permission [well, its in the public domain ? ] we could maybe use that as a starting point, and have your series zoom in on different aspects. Particularly with examples, more info and even anecdotes!!
http://www.ratcliffe.co.za/articles/basicpa.shtml
That's my 5 cents!