The full benefits of coderetreat come clear through the course of a whole day, starting with a session, or two, of understanding the problem domain, then the rest of the day is spent pushing our limits, accepting that our 'normal' way of coding isn't enough, that we should be striving towards an ideal. The format of the day is structured very specifically to allow for this experimentation. This is a reason we start early and I don't support having people 'drop by': we want time to get over the 'hacking away to finish' mentality that normally accompanies time pressure and brings with it the necessary corner-cutting. Focusing on improving our skills over 'getting it done' is one of the primary aspects that sets us apart from just being another hackfest: we are practicing to get better at the fundamentals. For example, we aren't there as a way to primarily practice or sell TDD, we aren't there to work on design patterns, we aren't there to finish the problem. We are there to work on learning better software design skills through exploration of the 4 rules of simple design. This is done through experimentation and exploration.
This past Sunday, Justin Searls recorded my introduction. This is how the day begins and sets the stage for the spirit and goals of the day. Feel free to embed this video into any blog posts you might write about coderetreat.