Try Pyramid is the official marketing website for Pyramid, with resources for extending your Pyramid apps. It also provides some sample "hello world!" code.
The first Pyramid app is a good place to start getting your hands dirty with an example project.
Six Feet Up explains why Pyramid is their choice for rapid development projects in that blog post.
Build a chat app with Pyramid, SQLDB, and Bluemix is a Pyramid application walkthrough specific to IBM's Bluemix platform.
Developing Web Apps Using the Python Pyramid Framework is a video from San Francisco Python with an overview of how to install, get started and build a web app with the Pyramid framework.
This podcast interview with the primary author of the Pyramid framework explains how Pyramid sprang from Pylons and how Pyramid compares to other modern frameworks.