daedalus
Have used forever. v1-v3. Great fun at first, then some rough patches duriung adolescence—v2 mostly. v3 has enough terrific features to outweigh the occasional hiccup (seems to take hours to add/edit shelves, for example, and the setting up/changing of details displayed in the list view is strangely difficult sometimes.) Use of iPad for scanning with WiFi is easy, fast, and profoundly convenient. Seems to handle about 2500 entries so far without stress or fatigue. Easily worth the dough I think.
Barelyconscious about Delicious Library 3