Diigo is fantastic social bookmarking and proto-blogging tool, marrying the best of del.icio.us, the leading bookmarking site, and Google Notebook, a recently upgraded and highly flexible tool for interacting with and reviewing your websurfing experience. I didn't spend much time with Google Notebook once I discovered it by way of comparing del.icio.us with Google Bookmarks, but I played with it enough to notice a lot of excellent features that del.icio.us did not have, including the ability to automatically associate bookmarks with a current project, flexible blog-like layout for groups of bookmarks, and collaboration features. As I moved bookmarks into Google Notebook, I started to realize I would be missing out on some advantages of del.icio.us, such as strong interconnectivity through tagging and an exceedingly simple and crisp interface. Enter Diigo, which retains del.icio.us's advantages while sprucing it up with notetaking, tagging flexibility, and collaborative features that rival Google Notebook and then some. I compare these three approaches to bookmarking on four fronts: tagging, blogging, collaboration, and "other stuff".