Everyone has preferred methods for where they keep their code and how they organize it, and there are a lot of conventions in web development about organization that are great to know about. Ultimately, if you have a workflow you like for working with code, especially code from tutorials, please just go ahead and use it. But for those of you who don't, I suggest you place the code you download in some kind of working directory where you keep (or plan to keep) all web projects. I typically keep all my web code in a directory I call work in my home folder. So on a Unix or Mac OS X machine, it would look like this:
~/work/320-and-up
A few last notes about where to put your code. If you are using this book specifically for the purpose of building something you want to deploy and use, you may only want to use the sample code as a reference and build your project using only the 320 and Up framework files provided. However, ensure that you put all of it in...