lnkify_tweet_text.js

function linkify(text){
    return text.replace(/(https?:\/\/[\w\-:;?&=+.%#\/]+)/gi, '<a href="$1">$1</a>')
               .replace(/(^|\W)@(\w+)/g, '$1<a href="http://twitter.com/$2">@$2</a>')
               .replace(/(^|\W)#(\w+)/g, '$1<a href="http://search.twitter.com/search?q=%23$2">#$2</a>');
}