Just as TechCrunch reported yesterday, Facebook is rolling out Friend Lists. Automatic generation of lists seems to depend on the data the Facebook user provided. These lists have existed since before the end of 2007. However, the expected mass adoption never happened. Thus, Facebook came up with another device—auto-generated friend lists.
Here's a copy of the prompt I saw today on my Facebook home page.
Check out this new Friend List.It will help you filter your stream down to the posts you care about most. This list was created based on friend details that you entered. You can edit or create lists from the Friends page.