I added a new quick reference, which is the workflow I currently use to produce two formats (alongside with what might be considered a by-product, HTML): Epub and Mobipocket.
It’s very much geared towards someone with a Mac; however, much of it is easily adaptable to a Windows or even Linux machine, since many of the tools mentioned are either cross-platform or can be run under CrossOver.
The RubyEpub tools mentioned from time to time aren’t necessary, but they make life easier. Right now to get at them you need Subversion knowledge. At some point I want to make them a standard release in one fashion or another, probably as a Ruby gem.