How to Find a Twitter RSS or Atom Feed

Just replace the xxxxxx by the twitter id here:

• http://twitter.com/statuses/user_timeline/xxxxx.rss
• http://twitter.com/statuses/user_timeline/xxxxx.atom

Just that the RSS feed goes much further to the past and the Atom feed doesn't.

Using this kind of feed helps me following people's tweets from within Google Reader.