Ontem, pude contribuir com o plugin Integration, enviando um BUGFIX. E já está no ar!

Nas últimas versões rolaram:

• Version 0.2.3 - BUG FIX: Rake db:migrate fails when default ENV['RAILS_ENV'] is used. Thanks to Celestino Gomes for fix this bug.
• Version 0.2.2 - Removed vendor/plugins/* commit. This commit is necessary when use plugins with externals but it isn’t a good practice. Piston is the correct way to use externals plugins. If you want to use externals commit in your integration process you can create a svn:commit:after task.
• Version 0.2.1 - BUG FIX: Setting ENV['RAILS_ENV'] wasn’t affecting migrations. This bug fix changes this behavior and makes sure that ENV['RAILS_ENV'] set by the user will always be respected, for all tasks. Thanks to Sylvestre Mergulhão for point this out.
• Version 0.2 - Added support for ENV['SKIP_COMMIT_MESSAGES'].