our world has expanded. Five years ago it evolved around the places you networked and the people you interacted with in non-work situations. LinkedIn changed the rules.
LinkedIn wasn’t the first social networking site, but it was the first to expand business connections in a large enough way to be meaningful. I have a Facebook account and it has been great to connect with old friends from college. I have a Plaxo account, and I love that it includes contact details, but not enough people are really using it.