From what I've read, delicious is likely to be sold again in a couple years. I don't know what the fandom will is, but I've set up on Springpad. (http://springpadit.com) It's prettier than delicious, but not as good with searching tags. You can't select all Panic fic, and then select all GSF within the Panic fic. For people who have a million bookmarks and who make them public, that would be a problem.