Arg, going over the alternatives in this thread and on the web, I fear the actual loss of delicious is its useful dataset.

With so many competing products vying to take its place, it will probably be a while before a de facto bookmarking service comes along and gathers a userbase large enough to be useful and years beyond that for that userbase to build the data to a point that approaches what we had with delicious.

Maybe some sort of anonymized delicious data export would be possible?