Ma.gnolia extends social bookmarking to groups and contacts, with basic social network functionality. I like it. Some of the design choices, like the way they chose to display groups in group listing pages, annoyed me a little. Having said that, I’m all over this, imported my delicious bookmarks, and am going to rip it up over there for a few days and see how it fits. Oh yeah, and ajax stuff and blah blah blah.