Ken's Key Takeaway:
Twitter now has a newer list upgrade. It is the answer to Facebook Groups. They have always had lists, but we can now have people in lists who we DO NOT subscribe to. We can also remove ourselves from other people's lists if we do not want to be on them. It should be interesting:
The newly launched Twitter Lists feature allows you to group together, follow, and find Twitter users. Learn the ins and outs of this new feature in our guide.
Via Ken Morrison