Railfans, some of them with computer skills, could create a website to do unified trip planning, even if pax still had to buy tix directly from each agency. There must be loads of us out there with an arcane but easy route that we know that doesn't show in any timetable (like my Champaign to South Bend example from my earlier post). The easiest level would be for enthusiasts in each region to come up with a guide to interline trips, put it online, and try to get the agencies to link to it and to keep printed copies in their stations. A variation on that would be, for example, to try to get, for example, the agency that prints and distributes the schematic map of Illinois trains to add Metra services to that map and include them in the sample trips they use as advertising; that stuff gets distributed in stations and on trains. Midwest High-Speed Rail might be interested in the idea. The next level would be a clickable map of the US that would let you see the various interline connections from particular Amtrak routes, and click through to the schedules and fares for each segment, maybe with some explanations of how to take particular trips. The next level up would be a planner that would take in the endpoints and spit out the itinerary, complete with links to the different operators so you could look up the schedules. Next above that would be a planner that could create your itinerary complete with times and maybe even fares taken from the operators' websites. (I think that last one is possible, a la Kayak.com, but probably involves a lot of updating and maintenance even after the enormous task of writing the software, finding all the links, etc.) If somebody made one of these websites, NARP might be willing to host it, or to pester Amtrak to host it, or at least link to it.