All the time, Daniel! Often my dreams are the source of great material, but as a busy woman, I don't always write them down. Sometimes, if I feel a really good one has flown, I put a pad of paper and pen next to my bed, ensuring that I will not forget the next one. When the subconscious is at work during dreams, I try to stay open to its messages as best I can so that my writing may-hopefully-benefit.
Will it come again? I'll let you know in the morning! ;)