Twitterholic is a web app to rank the most active and top twitter users. If you want to appear in their site just do what you are doing right now, tweet. Also you can search for any Twitter user and see his stats. Twitterholic is a ranking to know the most active twitter users in the twittosphere.
Venture Slogan: Don´t your thumbs hurt yet?
Twitterholic´s own description: “…Our twittastic robots scan the Twitter public timeline for new twits to tweet. A few times a day, we calculate individual statistics for each twittering twit in our database. In other words.. WE”R IN UR TWTTR PAGES, READN UR STATZ…”