Integrating Twitter with Drupal is very easy thanks to the module contribution from James Walker (Drupal User #1531)

Basic Drupal Twitter Setup

1) Download contrib module from http://drupal.org/project/twitter

2) Unzip and install Twitter module into : /sites/all/modules/contrib/

3) Enable the Twitter module by going to the module list page within Drupal admin: /admin/build/modules

4) If you want to expose Drupal actions to send Twitter messages, also need to enable the Twitter actions module.

5) Once the module is enabled, go to the Twitter configuration page withi Drupal admin: /admin/settings/twitter

6) On the Twitter configuration page, enter Twitter account username & password for the site's Global Twitter account. There will be a preselected option to "Import Twitter statuses", which you can fine tune or uncheck. Also, there is the option to prompt Twitter posting for particualr content types. That feature provides a Twitter post field to the edit page for any of the selected content types.

7) To configure Twitter for individual users on a site, select a user's account from the site's user list and click "edit" to access their profile page: www.yoursite.com/admin/user/user/list

8) Once on the user's profile edit page, choose the "Twitter accounts" tab. Then add the username & password for that user's Twitter account.

9) When the user's Twitter information has been entered and saved, their Twitter screenname will appear in the list at the top of the user's Twitter configuration page.

10) If you'd like to import all pre-existing user Tweets to the site, select the "Import" checkbox for that user's account. Note: A single user can have multiple Twitter accounts assigned to their profile. To add an additional Twitter account to a user's site profile, repeat the steps above.

Creating a View to Display User Tweets

1) ... Coming Soon ...