My Gemfile (Rails 3.0.0.beta3)

source 'http://rubygems.org'

gem 'rack', '1.1.0', :git => 'git://github.com/rails/rack.git'
gem 'rack-mount'
gem 'rack-test'
gem 'rails', '3.0.0.beta3', :git => 'git://github.com/rails/rails.git'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

# Use unicorn as the web server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# Bundle the extra gems:
gem 'devise', '1.1.rc1'
gem 'sqlite3-ruby', :require => 'sqlite3'

# gem 'haml', '3.0.0.beta.3'
# gem 'compass', '0.10.0.rc3'
# gem 'bj'
# gem 'nokogiri', '1.4.1'
# gem 'aws-s3', :require => 'aws/s3'

# Bundle gems for certain environments:
# gem 'rspec', :group => :test
# group :test do
#   gem 'webrat'
# end