The sample web that is downloaded along with the SubSonic source has been discussed periodically throughout this guide. The following is a list of what is provided.
App_Code\Utility.cs - Miscellaneous functions commonly needed when building web applications.
App_Themes - A default theme to get you started.
Dev\CodeTemplates - Text file representations of the templates used to generate classes. Use these as a starting point if you need to create custom templates.
Dev\DB - Sample database scripts for schema and data loading.
Dev\BatchClassGenerator.aspx - If your environment does not allow running in Full Trust mode, run this page to generate classes that can be compiled into the build. Add these classes to your project's App_Code folder and remove the build provider settings from the configuration file.
Dev\BatchScaffoldGenerator.aspx - Create scaffold pages automatically for each table.
Dev\ClassGenerator.aspx - Similar to BatchClassGenerator, but only creates code for a single class that is meant to be copy and pasted into a class file.
Scripts - SQL file for Northwind.
Find the entire series of posts here.