This looks promising. An extension or bookmark let is critical for adoption as it’s the easiest way to get bookmarks into the system. I would recommend trying

This looks promising. An extension or bookmark let is critical for adoption as it’s the easiest way to get bookmarks into the system. I would recommend trying out www.diigo.net to see how well their bookmarklet and extension works. It really is a game changer to get many more links into the system, combined with the ability to annotate individual sentences.