Here are some other documents seaking of Project-Builder.org:
A Project-Builder.org presentation made by Bruno Cornec.
The Project-Builder.org Lab: Experience yourself Project-Builder.org by following those Lab instructions ! Should provide you with at least 3 hours of fun discovering the tool with detailed explanations. This Lab has been developed for an internal HP Open Source and Linux Event I contributed to organize (TES 2009). Highly recommended to have a good tour of the features. By Bruno Cornec and licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License. Based on a work at trac.project-builder.org.
The Solution Brief developed by the HP/Intel Solution Center on the joint approach to develop with one source for mulitple platforms.