I wanted to add a keyword for a search engine but it says that a bookmark was already using it. I had a hard-time finding out which bookmark was using it. 1. The search was not looking for the keyword field 2. I couldn't display the keyword in the list so I couldn't sort by keyword. I wish both had worked. (Searching the bookmark list for a keyword as well as listing bookmarks sorted by keyword)
We plan to redesign the keywords ui in bug 648398, there's no other work planned for keywords atm.