With Twitter and Fan pages people are building much larger lists in shorter amounts of time and less money. Going Viral is something traditional email lists just can't do. Am I saying that emails lists are out dated? No. But I see them as possibly becoming less effective.. I have a list of about 2000 people. I never marketed much to them, but they all came from product purchases of various ebooks. I feel like if I really wanted to I could build a fan page much much faster and it could be niche related and cheaper to build. I don't know.. just some thoughts, how do you feel?