How to publish your blog feed to Twitter and Facebook
There are many ways to automatically update your Twitter feed when you create a new post on your blog. There are two that we'll look at that will work with any content management system that outputs an RSS feed: Twitterfeed, and Feedburner.
When it comes to externally hosted utilities like this, I rate them in two basic ways: functionality, and reliability. In this case, there's not a clear winner, since Twitterfeed beats Feedburner hands-down when it comes to functionality, but the opposite is true when it comes to reliability.
Twitterfeed offers more control over how it updates your Twitter account, and gives you the added benefit of also being able to update Facebook at the same time. Feedburner only updates Twitter, and offers fewer configuration settings.
Personally, I've settled on Twitterfeed for now because it solves two problems for me with its ability to update Facebook, but it has already had an outage at a very inconvenient time (the launch of a new blog), so for me it's on notice; any further outages and I'm switching to Feedburner.
If you're interested, Feedburner's Twitter update function is hidden away in the Publicize tab, down under the Socialize link on the left menu.