Here's a link to a site with forums that are specific to railroads: Railfan Select Forums once you get there. Some boards to look at under their forums:
Fallen Flags:
->Jersey Central Railroad
->Lehigh and New England
->Lehigh and Hudson River
->The Lackawanna
->Erie Lackawanna
Regional and Short Lines
-> New York Susquehanna & Western (NYS&W)
The Fallen Flags term is for discussion of all the railroads that no longer exist. Some of these railroads were absorbed by Conrail or just went out of business. There's a big following in this group.
There's also plenty of discussion of Railroading on this forum under Pennsylvania RR and PRSL.
May 21 & 22, 2005
Kids – dress in your Western gear, bring your cap guns, and help the sheriff protect the train against the dreaded Covered Bridge Gang.
The Black River Garden Railway Club will be setting up a 50' x 30' portable "G"-Scale garden railway in the picnic area next to the Ringoes Depot. See live steam and model electric trains operate in an outdoor setting.
MIXED TRAIN
August 2005
Take a ride back in time, when the only passenger service on many rural branch lines consisted of a coach on the end of the local freight train. Get a glimpse of modern day shortline freight railroading on the annual Black River & Western Mixed Train departing Ringoes at 10 AM for a day long excursion. Tickets are limited so reserve yours today by calling 908-782-6622.