Are Twitter lists the new #FollowFriday?

If you have been using Twitter for a while, you have surely seen many tweets posted every Friday by thousands of Twitter users, prefixed with #Followfriday, #followfriday, or #FF.  What is #Followfriday?  #Followfriday is quite simply, a way to recommend to all your followers,  the people you follow whom you feel share valuable content, e.g., [...]