A slide leaked from an internal meeting at Yahoo on December 16th indicated that Yahoo was planning to "sunset" their social bookmarking service Delicious (aka del.icio.us).
A couple of days ago I got a question from a library director who wanted to know how she could save her Firefox bookmarks. (She's preparing her laptop to be wiped clean so Windows 7 can be installed, and wants to be able to copy the bookmarks & then re-install them on the PC.)