twitter_bot.rb

# http://rcbth.com/p/getting-an-oauth-token-for-your-twitter-bot
require 'rubygems'
require 'twitter_oauth'

client = TwitterOAuth::Client.new(
  :consumer_key     => 'BUH',
  :consumer_secret  => 'BUH'
)
request_token = client.request_token

puts "#{request_token.authorize_url}\n"
puts "Put in your pin when you get it."
pin = gets.chomp

access_token = client.authorize(
  request_token.token,
  request_token.secret,
  :oauth_verifier => pin
)

puts access_token.inspect