Ah, paper. No matter how technologically advanced we become, we still crave the nostalgic sight, crisp sound, and comfortable feel of paper in our hands. Case in point: Paperless Post . I received an invitation through this sophisticated site over the holidays. Paper it is not, but it does the best job of imitating old-fashioned invitations that I’ve seen to date. An envelope is delivered to your inbox and you have to click to watch it unfold. Magic.