[rdoherty]

This looks awesome! I hope to transition to it, handling Jenkins configurations is a huge pain.

Some of people also use their CI tools for running arbitrary one-off scripts (like deploys). Is this possible with Concourse? Currently we have a few Jenkins jobs that just execute a fab task that then does the actual work.

[XenoPhex]

Yup! Concourse has an idea of 'one-off' builds that can be executed from fly as long as you provide all the inputs to the task. This can be done via "fly execute": http://concourse.ci/fly-execute.html

[vito]

In addition to what XenoPhex said (`fly execute`) you can always just configure a job that's only ever manually triggered.