twitTangle: Organize Twitter Friends by Priority and Type
twitTangle is a free web based service that can help you organize Twitter friends that you follow by priority, your relation to them and category. This method can help you to track tweets from people who really matter to you. twitTangle gives priority to tweets from those rated or tagged friends and show them first on your twitTangle homepage.

To log in and use twitTangle, you must create or have a Twitter account first. Next, there are three unique things that you can get from twitTangle. And here they are.
Rate:
Rate your favorite Twitter friends from 0 (just friends) to 200 (I love them). Just click on the “Rate” to do this. The higher rating the more important the tweets from that person are. Thus you’re likely to see his/her tweets more often.

Tag:
Tag your friends. Click on the “Tag Me” and fill the box with the relevant tags. These tags will help you to classify your Twitter friends based on such relevancies. For example, you may tag @makeuseof account with tags/words like tech tips, web 2.0, web service, and so on.
Groups:
Organize friends into groups. When you click on “Groups” there are three options to choose from: Family, Coworkers, or Classmates. Add your friends to the relevant groups.
Check out twitTangle @ http://twitTangle.com/ ( Contributed by Wim Permana from Wimkhan )



Thanks I have been looking for something like this so I can categorize the way I read my tweets!!!