HootSuite is now also providing a service like twitterfeed.com, it actually helps the user to update his profile automatically without being spending time for tweets. I think this feature of Hootsuite will highly benefit the users for increasing their followers.
How it is effective than Twitterfeed?
Actually, Hootsuite is well known to most of the users and they believe that it only provides the user to tweet for their multiple profile at a time and no other stuffs.
They put this service under the settings option. Check it out if you are thinking of automated posting...