I ran across this article that proposes drying, powdering your pine trees or Christmas tree to use as flavoring for foods like cookies, rice, roasts.
http://eater.com/archives/2010/12/27/of-course-rene-redzepi-wants-you-to-eat-your-christmas-tree.php I grow a variety of evergreens including white pine, canadian hemlock, firs, spruce, red pines. I have eaten the hemlock leaves while on winter hikes. I do know the the Greek Retsina is a pine cask flavored wine, so there are authenticated edible uses for pine.
Has anyone put this to practice, or if this has been covered somewhere on the Permies forum, please link.