I can't claim to have any solid evidence for the existence of this, but at the same time I don't have any reason to disbelieve that "dream sharing" is possible. I think it's a little naïve to think that modern-day science has unravelled all of the mysteries of the universe...We don't even know how or why the mind (sentience) works. In terms of this psyche-sharing, the only experience I have had is dreaming about a very specific situation dealing with specific people, only to find out later that what I had dreamt and what had happened, had in fact occurred at almost the exact same time (There is only one time in which I had written down my dream with the date in a journal, and so I could verify that it had in fact been the same night). I believe in the existence of coincidences, but I also attended a lecture in the Carnegie Lecture Series in Washington, DC at GWU, by a mathematician/statistician who had worked out a dissertation that coincidences are not as frequent as we think, and are in fact relatively rare. We often overlook the connectedness of everything around us. I often find myself having the exact same thought as someone with whom I have spent a lot of time with--it has happened so frequently, in fact, that I once entertained the idea of actually writing down each occurrence, the circumstances surrounding the occurrence, and how close our brains were to each other (for a while I imagined that there was some amount of radiation being released from the neuron-system that could "interfere" with another's neuron-system...but I scrapped this theory when I had the same occurrences at completely random distances; a few times even across the Atlantic). True skepticism does not mean denying the possibility of the existence of these phenomena (this is called narrow-mindedness), but rather taking the most neutral stance one can.