I just downloaded TweetDeck yesterday and couldn't wait to share it with you. Okay, so maybe I'm the last person to use it, but I couldn't take the chance. Everyone who uses Twitter first needs to follow me (!) and then needs to know about this amazing tool. I'm glad I was paying attention when @lisacall mentioned it in her tweets.
In TweetDeck, all of your Twitter stuff appears on a single page. Below is a screen capture that shows how this looks on your screen.