OpenShift Origin is the open source upstream for Red Hat's OpenShift Platform-as-a-Service offerings. Red Hat engineering director Matt Hicks talks about the tools and practices that let developers engage with OpenShift and how people can get involved.
The OpenShift community page also has a lot of great links to get you started, including to a Google+ community list and IRC channels.
I'd also like to plug the upcoming OpenShift Origin community day, which will be held in Portland, OR on April 14, the Sunday before the OpenStack Summit. If you're going to be in Portland, I encourage you to check it out.
You can also read more about this topic here.
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