Somehow, I feel like Steven Cohen will make me rue the day I point this out, but there’s an amazing new WordPress plugin for Twitter from Alex King called Twitter Tools. It has the ability to post to twitter from your WP blog, from twitter to your WP blog (not sure what happens if you turn BOTH options on, besides the eventual heat death of the universe), and even has an API hook built in to further allow for Twitterific integration. Also built in is the ability to Daily Digest your Tweets on your blog as a one-shot post. Brilliant!
Will work for both Widget and non-Widget loving WP types. I just installed it, and love the flexibility and control. Check the ReadMe for more info.