Full disclosure, I work for salesforce.com.
My job is helping developers. I help existing developers who work with our platform do their job better. I try to help developers who want to learn to use our technologies.
I really love the OTS way. Free learning, Open source solutions. Open source training materials. I'd like anyone in the world to be able to pick up quality training materials and run a workshop to help others build apps using our platform.
I'm new, and have only used some online material from OTS as of now, so any suggestions from the community here would be much appreciated.