Since I am such a fan of networking, it is only natural that I'd get involved in some virtual versions of what we use to have to do in person.
I've met a few individuals who rarely network "live" - they use the power of several web-based systems to make their connections.
Most of my experience and success has come from Linked-In. Recently I found a site which I'm still exploring, but has lots of tips and knowledge on all of the top business networking sites called The Virtual Handshake.
Today I made a connection with a former colleague I'd lost track of who is now in Europe and we're talking about a collaboration - don't underestimate this powerful way to connect to others.