So here is the updated version. Just drag this bookmarklet to your bookmarks bar.
Twitter Bookmarklet
Click here
Here is the code:
Updated version of this bookmarklet is here Twitter bookmarklet
You are reading a great article on the web or you found a great website. Now you want to share it with everyone on twitter. Just click on "TweetThis" bookmark in your bookmarks tab and it will take you to twitter with url already shortened with bit.ly.
Drag this Twitter Bookmarklet to your favorite browser's Bookmarks Toolbar.
UPDATED bookmarklet - includes page title in a your tweet.
New: TweetThisSource code:
javascript:function loadScript(scriptURL) { var scriptElem = document.createElement('SCRIPT'); scriptElem.setAttribute('language', 'JavaScript'); scriptElem.setAttribute('src', scriptURL); document.body.appendChild(scriptElem);}var url = 'http://api.bit.ly/shorten?version=2.0.1&login=bitlyapidemo&apiKey=R_0da49e0a9118ff35f52f629d2d71bf07&longUrl='+document.location;var longUrl=document.location;loadScript(url+'&callback=tweetme');function tweetme(json){var shortLink = json.results[longUrl].shortUrl;document.location='http://twitter.com/home?status=I+found+this+great+thing+'+shortLink}