I wanted to announce that I recently released the first version of the BigTweet Button WordPress plugin - http://wordpress.org/extend/plugins/bigtweet-button/
This plugin is similar to the nicely done Tweetmeme button, but with very different functionality. It allows a site visitor to post to Twitter without leaving the web page (keeping visitors on your site). Bit.ly is used as the URL shortener and the tweet count next to the button links to a detailed Bit.ly page of click statistics.
This was my first WordPress plugin, so I decided to heavily comment the plugin code itself with lots of WP documentation references for the benefit of other new developers (I benefited from looking at other code samples).
The homepage for the plugin is at
Feedback is welcome.