In the second screencast about CRX Quickstart I show how to create a web site like TheServerSide.com in 15 minutes(*). This is achieved in a Data First-like approach: no schemas or the like have to be set up to get up and running. Since the JCR compliant repository underneath has functionality like search, versioning, access control, etc built right in the software created in this demo is not a throw-away prototype, but can evolve into production.
(*) The first screencast is here - you might find it beneficial to watch it first if you want to follow the technical details of this screencast.
Update: for doing the examples yourself with current versions of Sling or CRX Quickstart please see the errata before.