Around March 2009, that was the time when I started to use this micro-site called Twitter. As of now, I tried around more than 10 twitter apps including (probably the most unique) of tweeting via email (yes, there is one around last year)
Around early Saturday morning, I got a chance to watch this newest video from Twitter itself. They gonna unleash a new twitter soon. From what I saw, there's only one word that popped out from my mind, convenience. I remembered the convenience of Tweetdeck which your mention tweets, the people that follow, etc. are all in one window.
If you still don't know about this new thing, check this out