This plugin by 0xTC implements Twitter’s own Tweet Button on your blog or site. The tweet button can be positioned as you please and can be styled to your delight in the settings page. This plugin is based on TweetMeme by dtsn.
Version: 1.0.0 Requires WordPress Version: 2.7.2 or higher Compatible up to: 3.0.1
Plugin is used on this website.
Plugin homepage: http://0xtc.com/2010/08/13/wordpress-plugin-for-twitters-tweet-button.xhtml