Consider this though: Face-to-face is becoming more common in Canada (I was recently approached by two separate large and well-known international nonprofits in Toronto within 10 minutes), and Greenpeace already is successfully acquiring new donors in many U.S. cities.
While the U.S. is by far the largest philanthropic market in the world, there are other markets that are growing significantly (i.e., Latin America). These markets have not had the luxury of fundraising best practices or standards, and they often lack an established culture of giving. Many times they do not have a professional fundraising body and lack the capacity that we in developing countries take for granted.
What we do see in these markets are organizations that are extremely creative. They innovate. They take risks. With little to lose and almost no resources, they look for new and unique ways to reach their constituents and find great, and often unexpected, success. Perhaps that is something we can learn from them.