As a little project last Saturday I started a new facebook group called "Catholics Are Christians." In just 4 days we have almost 1000 new members join the group and have had numerous discussions and opportunities to witness to our Catholic faith. Thank God for the many opportunities he gives us to witness through the new social media including Twitter.
I still think of St. Francis De Sales though. Even without a Blackberry or an iPhone, or broadband access, he won 60,000 Calvinists back to the Church in the 17th century. His method was preaching and hand writing tracts and slipping them under the door of ex-Catholics.
I like to think of these internet efforts as "slipping a little tract" under the proverbial "doors" of those who may be open to the Spirit in bringing them home to the Catholic Church. You can't know until you try.