URLex is still in it's infancy, but I think it shows promise. A brief description of the site follows.
"With URLex system you are able to leave a comment regarding any internet link on any site. The comments are available either only to you and your friends, or anyone visiting the site. You now have an opportunity of expressing your thoughts regarding any information placed on the internet. The system enables you to leave notes on the pages and sustain the conversation on a selected topic. You can enter communities, or create your own, exchange links there. You can restrict the access to your comments by creating a closed community and providing access to the information by issuing special invitation."
Once you join, leave a comment on this post if you would like to be added to my community. My group is called "Farrercommons". Big surprise, eh? Let's see what evolves from the use of this tool?
A extension for Mozilla Firefox users is below.
Mozilla Update :: Extensions -- More Info:URLex! - All Releases
P.S. I forgot to mention that this is my 100th post. (counting both my posts on Davis County Watch, and Farrer Commons)