Commas will be the death of me. Something about researching and remembering commas rules is beyond me. It's a never ending frustration.
On The Premises just posted a great blog article on the topic: http://onthepremises.blogspot.com/2012/11/fun-with-commas.html. My hope is that their view on commas is the widely accepted version, because their take is so similar to my personal writing style.
On the Premises recommended this Wiki article too, if you want the dissertation version of the comma argument: http://en.wikipedia.org/wiki/Serial_comma.
I hate commas, end of story.