If you twitter user, You must be posting your blog posts to your Twitter account so that people can find the latest news and updates. Every time adding and submitting your blog posts to your twitter profile can be a boring task and that is also if you update your blog frequently and regularly. So you need a application that would automatically tweet your blog posts to Twitter.
There are many sites which offer to do this whenever you update your blog. But I will go with Google Feedburner. And also a link shortening service provided by Google known as http://goo.gl/.