For those of us who shy away from social networking sites such as FaceBook, MySpace, Twitter and the rest, there is still one useful option. Consider using LinkedIn if you want a place to list a public profile, viewed by other people with your professional interests. It's like old-fashioned networking for business folks, without the "Hello My Name is...." badge.
You know a lot of smart people, and they know many other smart people. LinkedIn is away to see who they know, and ask for an introduction or get recommended as a respected contact.
The exponential growth of those connections is what makes LinkedIn worth a few minutes of your time. For example, I have a modest 23 connections out there, but that gives me a link to the 615,600+ professionals who are all someway/somehow linked to someone I know.
That's wide exposure to people who may want my consulting services, hire me as a speaker, or who may want to purchase Release Your Writing or Computer Ease. Take a look at LinkedIn.com if you want to expand your reach.