Have you already used twine, if not check it out. It is like a social bookmarking system and i am using it lately extensively for getting the latest information about the semantic technologies and the next generation web 3.0. After using it for about a week or two it starts to “know you” and recommend useful information based on your interest.
For example today i got this video with “Did you know” stuff which is mostly mentioning things about the internet but there are some nice facts about the population in USA, India. It is really interesting i think .
Check this video also which was in the web 3.0 twine section of mine. This is Kevin Kelly and he is talking about web 3.0 and how he sees the WWW 20 years from now. It is a must see