This page is now part of another experiment where a social bookmarking service is tested. I will see if this helps in the search results. You will get new information as soon as it is available.
Basically the service will submit the best page in the universe to all social web sites that will take bookmarks and we will monitor the results in the search results and also what gets indexed and what does not. When this it taken care of, a complete list of good social websites will be established.