Ideas as a Network

One of the main ideas that I drew from Chapter 4 of Where Good Ideas Come From was the continuation of the thought that ideas come from a network of cells firing together.  However, I found the part about innovation coming through dreams to be extremely interesting.  My favorite idea that came through a dream was when Kekule discovered the formation of the benzene ring through a daydream about Ouroboros, the serpent from Greek mythology.  It is amazing how we can find some of the greatest ideas through "serendipity".  Have any of you ever had any inspiration or ideas that came about through serendipity?