I'm looking at your screenshot [1] right now, and one question comes to mind: How are users going to organize their bookmarks on Nilai? The drop-down design shown in the screenshot reminds me of Gmail's labels, which will turn into a mess once you go beyond a certain number of tags/categories. Besides, everyone else uses the same organization system and similar features. Why should I try Nilai when I've already paid a one-time fee to Pinboard?
Well, here's one possible reason. Just the other day, I was trying to import my browser bookmarks into Pinboard, but aborted when I realized that Pinboard would not preserve the elaborate folder hierarchy (270+ folders) that I'd created over the years to organize my 5600+ bookmarks, many of which I never tagged. If there's any non-social bookmarking service that allows me to use both folders/subfolders and tags/labels to organize my bookmarks, I'll sign up in an instant. This isn't about fancy features, it's about basic paradigms. So there's a little feature request!