Originally I was thinking it'd be nice to have the bundler setup files in a directory that was relative to the rack app itself; if you were loading multiple rack apps, it seems like this change would mean that all of the combined bundler stuff would have to go into a single 'setup' file up towards the project root, rather than being relative to the individual rack app.  Am I getting that wrong?  Your approach may be better, just wanted to raise the question.