Justin Smith at Inside Facebook has the 411 on a new feature on Facebook — everyone’s social-networking walled garden of choice, it seems. The site now allows you to create (gasp) lists of friends, and then easily send messages to one list or another (don’t worry, no one will see whether you’ve put your boss or your high-school pal on the “Mostly Ignore” list). This comes along just as Mark Cuban is wrestling with how to rank his 5,000 friends — so now he can create three lists: people more important than me (a small list, I’m sure); people as important as me (also small, I would imagine); and everyone else. Josh Catone at Read/Write Web is right though — the new feature needs privacy settings built in.