As a consultant, I’ve looked over a shitload (how many? probably ~150-200) over the last 12 1/2 years in the Ruby on Rails community. I haven’t worked on most of them, but I do get invited to look over, review, audit, and provide feedback on a lot of those.

Over on the Planet Argon blog, I’ve shared my quick hit list of a few initial things that I look for when reviewing an existing code base: http://blog.planetargon.com/entries/ruby-on-rails-code-audits-8-steps-to-review-your-app