This is an example of Omniauth (1.0) with Twitter integration. It was inspired by a discussion the boston.rb mailing list, specifically:

http://bit.ly/v9oN1m

This is the simplest Rails 3.0 + Omniauth 1.0 app I could come up with. After you authorize, it can tweet a message on your behalf.

Setup:

• create a twitter application at http://developer.twitter.com
• set callback to be http://127.0.0.1:3000 (assuming you are running it locally)
• copy down the consumer key and consumer secret
• export those values into your shell environment like
  • bash: export TWITTER_KEY = ... ; export TWITTER_SECRET = ..
• bundle install
• rake db:migrate
• rails server

Look at it for the following

• session creation with omniauth
• using the twitter gem to communicate with Twitter

Don't look at it for anything else :) (like testing).