Something you should know about: the weblog Old Life: Reformed Faith and Practice and the sporadically published quarterly newsletter the Nicotine Theological Journal edited by my friend D. G. (Darryl) Hart and John Muether ( subscription information here and archives here ). Both the weblog and the NTJ are lightly written but substantial and thoughtful reflections on the life of the seriously Reformed churches and the Reformed engagement with the world. The latter was occasionally quoted by Father Neuhaus in “The Public Square” and recommended by him and Wendell Berry.
The writing is vigorously Reformed and usually on Reformed subjects, but the newsletter often include articles of more general appeal (I remember a rather moving review of a biography of Pete Maravich). Catholic readers will suffer the occasional annoyance the issue I was just reading includes the line “Roman Catholicism may not make one a good Christian,” for example but they will also learn a lot about their conservative Presbyterian brethren, and I think will find that they like them a great deal.