I'm publishing this more as a FIY than a qustion. RFI (the Italian agency that manages the rail infrastructure) has vastly improved its online tool that allows you to check the general schedule of trains on any station in Italy. The query tool is here: http://www.rfi.it/cms/v/index.jsp?vgnextoid=f3fe155031639210VgnVCM1000004016f90aRCRD#2 While this is by no means a substitute for specific price searching or itinerary searching, it provides some comprehensive information on things like "what trains run in Corniglia" and the likes.
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