Twitterfeed seems to be an awesome (and free) service which allows you to post your blog posts to Twitter and Facebook simultaneously. I am testing it out now – with this post. Please forgive any issues!
Twitterfeed uses the Bit.ly URL shortener, which I like, as bit.ly keeps good stats on how many times the links (URLs) have been clicked on. Twitterfeed is now owned by Bit.ly, strengthening the connection.