A short bit ago, I'm finally starting to get my head wrapped around them, but this Q&A is clear, concise and appears to be well-rounded. They also provide a pdf version for printing and redistribution.
Things have been quite busy recently, so I've had little time to work on the site or post to the blog, but I'll continue linking to through the sharing feature of my RSS Reader (Google Reader - I highly recommend it). Just scroll down the home page of my blog and you'll see them in the news section on the right sidebar looking like this:
