Twitter Tools is an awesome Twitter plugin for Wordpress. I am waiting to see what the weekly digest looks like when it posts.

From the plugin page:

Twitter Tools is a plugin that creates a complete integration between your WordPress blog and your Twitter account.

Details
Twitter Tools integrates with Twitter by giving you the following functionality:

* Archive your Twitter tweets (downloaded every 10 minutes)

* Create a blog post from each of your tweets

* Create a daily or weekly digest post of your tweets

* Create a tweet on Twitter whenever you post in your blog, with a link to the blog post

* Post a tweet from your sidebar

* Post a tweet from the WP Admin screens

* Pass your tweets along to another service (via API hook)