Here is a video of our talk at PuppetConf 2012, where we describe a little about our puppet infrastructure and how we’ve scaled to over 1200 nodes managed fully by puppet.
Our puppetctl tool is available here: https://github.com/mozilla-it/puppetctl
Our inventory management tool is available here: https://github.com/rtucker-mozilla/mozilla_inventory
More information on puppetctl is available on our previous blog post: https://blog.mozilla.org/it/2012/10/01/mozilla-open-sources-puppetctl/
PuppetConf 2012 Keynotes: http://puppetlabs.com/community/videos/puppetconf/
PuppetConf 2013 Notification: http://info.puppetlabs.com/puppetconf2013-notification.html