FYI, I have tried the same using https://api.twitter.com as well. Also in step 3 I have currently changed it to "https://api.twitter.com/ oauth/authorize" because I believe that is the more correct URL (though authenticate does appear to work).
Any thoughts? -- Twitter developer documentation and resources: http://dev.twitter.com/doc API updates via Twitter: http://twitter.com/twitterapi Issues/Enhancements Tracker: http://code.google.com/p/twitter-api/issues/list Change your membership to this group: http://groups.google.com/group/twitter-development-talk
