
There will never be a replacement for that ongoing physical contact. But I don't think blogging is meant to replace the face-to-face of friendships and meetings. Blogging is a way to keep in touch with a larger group of people on an ongoing basis, in a more efficient way.
The one thing I have learned as a CEO is that leadership at various levels is vastly different. When I was leading a function or a business, there were certain demands and requirements to be a leader. As you move up the organization, the requirements for leading that organization don't grow vertically; they grow exponentially.