Facebook has recently released yet another new feature into the product offering for the website, the new feature is called “Facebook Lists” it has been live fore a few days on most Facebook accounts.
This is a clear mimic of Twitter Lists, yet with more functionality. Currently your Facebook lists are defaulted to specific groups you have already set up on Facebook such as work friends, family, GEO location mates and uni mates. I would advise to look into customizing this feature as it does save time and is quite cool.