There are certain parts of Bundler that can (and perhaps should) be merged into RubyGems. Now is not the time to work on that, but after Ruby 1.9.3 is out, cons

There are certain parts of Bundler that can (and perhaps should) be merged into RubyGems. Now is not the time to work on that, but after Ruby 1.9.3 is out, consider raising this question with Evan, as there is some potential there.