Hi If you are building a niche article website network or just have lots of sites. Take a look at this www.randomnetworklinks.com Whenever you publish a new site - or join a new affiliate scheme - just add the site title and site description to your main admin area and its instantly included in the links displayed on all of your other sites.
I use a script to accomplish something similar to this, and have no need to use a third-party service. The script is used for other purposes however, such as a standard TOS and Shipping Info page. I just update the content on the central server and the other sites are up to date instantly.