Deploying to Heroku with Rails 3.0.0.rc

UPDATE: This issue has now been fixed.

The Ruby on Rails Tutorial book uses the latest version of Rails, which is the current release candidate of Rails 3.0.0.rc. Unfortunately, at the time of this writing, you can't deploy applications to Heroku using the Rails release candidate because of a conflict with the latest version of Bundler. See this blog post for a possible workaround.