Categories for People You Follow

I think it would be awesome if you had two categories for people you follow. "Friends & Family" and "Everyone Else". Kind of like Flickr's two types of Contacts. It helps you sort through your content. There could be a tab for people you are close to so you can see all their tweets and one for people you don't really know but like to follow occasionally. When you get too many people you are following it gets hard to follow ALL the tweets. But I don't want to miss the tweets from my close friends.