I've just added Drupalzilla.com to Twitter at http://twitter.com/webmastertips.
Drupal has a Twitter Module, but it doesn't come with any documentation. This post is a first test of Drupal's Twitter Module on this site. If it works, I'll follow up on this post.
UPDATE: The Twitter Module for Drupal works. Here is some documentation for it:

Once you have followed those five steps, every time you post to your Drupal site from that user account it will add the post to your Twitter account.
By the way, check out this comparison of icons from Drupal (top) and Twitter (bottom).

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