PingTwitter allows you to automatically update your Twitter Account when you publish a new blog post. It’s as simple as sending a trackback. When you publish a blog post, all you have to do is send a trackback using a special URL which contains your username and password information. It will then update your twitter feed with some information about the post you just wrote. It do not store your password anywhere.
The Trackback format is:
Where [u] is your username, [p] is your password, and [l] is your location (optional)
You can also use the below form and it will generate the URL for you.