In that last example you might put a comma after b but never "and".

There is a wonderful book by Lynn Truss called Eats, Shoots and Leaves. Putting the comma after b is what lawyers would do.

I found a couple of links:

http://owl.english.purdue.edu/owl/resource/607/02/

http://grammar.about.com/od/punctuat...commaguide.htm

Hope they help.