As mentioned last week, Kevin Clark is taking your suggestions and developing weekly guides that cover the ins and outs of Rails.
He’s delivered on his first guide: Environments in Rails 1.1. The accompaying Cheat Sheet is particularly noteworthy. It lists all the various configuration options available to you, with a brief description of the purpose they serve.
To have your say on what Kevin covers next, send him your suggestion at kevin dot clark at gmail dot com with [idea] in the subject.