Call it a clan, call it a network, call it a tribe, call it a family: Whatever you call it, whoever you are, you need one. - Jane Howard
Social Networking sites are. I would provide a list, but there is a list to the right of this post encouraging you to submit this post – so, I will not remake the wheel.
Alltop.com is currently my favorite one stop blog list. But, what if you want to bookmark a site (perhaps your own…) to all of the social networking sites. It can be a long process to add things to each site or even the two or three you use.
Louis Liem at HomeBiz Resource has posted a review of three automatic social bookmarking submitters. These are sites that allow you to enter one URL to submit to multiple social networking sites. Liem looks at Social Marker, Social Matic, and Social Poster, providing the pros and cons of each site. He also goes through the required steps of using each site.
If you are going to add a button or widget from one of these sites to your webpage, then I would suggest reading the post because it gives you a good idea of what steps each site will require from your readers. For example, one of the cons for Social Marker is a tendency to crash after going through some of the required steps. I have not had this experience with the frequency reported by Liem, but I would not want a loyal, referring, repeat reader to run into such a crash.