Diigo had the misfortune of being labeled a simple 'social bookmarking' site early on but they've risen above that to garner a lot praise from respected reviewers (like us!) As Solution Watchnotes: "The hard part though is standing out as the unique and powerful service that Diigo is and not appearing like it's just another Del.icio.us clone. AndCNET adds: Diigo's advanced search lets you scour the text of pages you've bookmarked--not just the basic titles, tags, and URLs --as well as your own highlights and comments."
