This is an idea that I have been thinking about for a year or so. When I first started studying wikis and especially science (and nanotechnology in particular) a couple of years ago, I came upon a wiki that had a sort of train or bus system within it, that ran from wiki to wiki. It may have been the Meatball Wiki. My idea is to construct a Virtual railway among all of the Wikia wikis (at least among those Wikia wikis that are interested in joining the Virtual Railway system).