Here are some sites that should be of interest to visitors to the Piedmont 'N Southern website.
Athens Bend Track club
Central Railway Model & Historical Association, Inc.
French Broad E'N'pire
Official Bend Track site
NMRA Palmetto Division
NTRAK Modular Railroading Society, Inc
Blue Ridge Hobbies
Tex-N Modular Railroad Club (Plano, TX)