Diigo? I like the look of the interface, and the social aspect looks extremely promising, groups in particular. But import from Delicious is broken; only the first 255 characters of notes come through. Since I use notes extensively (especially for CF) that’s a show-stopper. And Diigo seems equally focused on user tasks other than entry of bookmarks. The rapid addition of features might be cool; it’s certainly preferable to Delicious’s model, near-complete neglect, though I worry about bloat. I guess I’m unusual in spending a fair amount of time tagging and annotating entries, rather than just clicking “Add” and taking whatever tags are recommended.
So, back to a little more experimentation, the proverbial drawing board. Which may end up being Pinboard. If it wasn’t for their “anti-social bookmarking” ethos, I’d have made the move already.