I've just finished my first talk about Puppet. I gave the presentation for 10-15 rubyists, gathered through the local Ruby Brigade. It all went well. You can download the presentation as a PDF here

I went to my first Copenhagen.rb meeting a couple of weeks ago, and of course talked to some of the people attending. One of them asked what I was doing with Ruby, and I told him what I'm doing with Puppet. He found it very interesting and asked if I would like to give a talk on it on some of the future meetups, and I agreed. So one of the next CPHrb meetings I'm probably giving a talk on Puppet.