@home is a great new resource for Old House owners. The website: http://athomenation.org/
offers a wealth of information fro Old house owners on such topics as guides for reducing energy consumption (and costs!) in your older or historic home, One-stop shop for resources and tools for protecting your neighborhood against McMansions.
You can also view restored Historic homes in their online gallery, set up your own profile with details about your restoration and find others with the same old house interests. the site is sponsored by the National Trust.