One of the Feedburner features was an automated "tweet your rss feed to twitter" which, of course, allowed Google to gather data about webmasters social profiles. Google removed the feature when they were shut out of twitter.
Do you know if TwitterFeed.com works? I'm signed up with them but never see any evidence of my feeds being tweeted. I've thought about killing the account but figured it wasn't doing any harm and might start working someday.