I put together a presentation this past week about building small, fast websites with Ruby and Sinatra, and then deploying them on Heroku. I had less-technical users in mind with this presentation. If you're a hardcore developer you have no problem setting up a web server from scratch. This is geared more towards designers who can make beautiful sites but aren't used to making them dynamic or pushing them public to the world.
You can download the sample code used in the presentation from here: http://empty-journey-91.heroku.com