But once the dust settled after the initial change-over, I continued to use delicious for my non-fannish bookmarking. Except I only just now realized that they've moved to comma-separated tags ... so while it transitioned already-tagged stuff fine, it's been interpreting my current entry tags as giant tags, which I now have to go back and fix. (Also, when I go to edit an entry, it won't let me just edit the tag, I have to delete the tag and start over. [Edit: Though I still have the old bookmarklet widget, which WILL let me just insert in commas -- which occurred to me AFTER I'd done all the retagging manually. Sigh.]) You couldn't have a pop-up, folks? Or even an email with "here are some important new changes to how this site works?" Many of us have the bookmarklet extension installed, so we never go to the main page and barely go to the website at all, so if this info was there, it doesn't help!
(Interestingly, if you click on a tag, it'll give you entries that include that tag in their giant tag, which I guess eliminates the need for me to tag e.g. "religion:Christianity" tags separately with "religion.")
Edit: And it seems to not recognize various characters, so clicking on my "#OccupyWallStreet" tag, for example, is useless, as it thinks I don't have any items with that tag. *sigh/eyeroll*