Google introduced a Socialize feature inside FeedBurner in december 2009 that would allow blog publishers to quickly and automatically push updates on to Twitter without using a third service but Google Drops Auto-Publishing to Twitter Feature from FeedBurner.
I like the socialize feature of feedburner but Google has silently dropped Socialize option from FeedBurner dashboard and hence Twitter integration from FeedBurner is no longer available but there is a simple trick by which you can integrate you twitter account with FeedBurner and auto-publish your FeedBurner feeds into your Twitter account.
How To Publish RSS Feeds to Twitter
As the Socialize option is no longer available in FeedBurner, you need to integrate you twitter account by a URL based hack.
Go to your FeedBurner account at feedburner.google.com and open any of your feed and go the publicize tab.
Now you will the url into the browser address bar like below
http://feedburner.google.com/fb/a/publicize?id=[Some numbers or session id]
Now replace the word “publicize” with “socialize” and hit Enter.
http://feedburner.google.com/fb/a/socialize?id=[Some numbers or session id]
This should enable the Socialize option in your FeedBurner feeds for a particular feed. While you are here, you remove your Twitter accounts that are configured to auto-publish your FeedBurner Feeds or associate your Twitter account with any new feed as Auto-Publishing to Twitter still works hassle free from the feedburner feeds using Google Short URLs.