Just spent the last hour finding all the Twitter Wordpress Plugins that are available.... did I miss any?

Comment Twitter SMS Notification
Get notified by SMS when a user post a new comment on your blog.

Twitter Tools
Automatically posts to Twitter when you publish a new blog post or gives you the option to post it to twitter manually. And can pull your "tweets" into your blog.

What is TwitThis?

TwitThis is an easy way for people to send Twitter messages
about your blog post or website. When visitors to your website
click on the TwitThis button or link, it takes the URL of the
webpage and creates a shorter URL using TinyURL. Then visitors
can send this shortened URL and a description of the web page to
all of their friends on Twitter.

Add this code to your website, or download the wordpress plugin