I have been messing around a bit with Koding(https://www.koding.com/). It's an online editor/development environment that has some cool features I haven't seen with other similar products. I noticed in the docs that you can use Koding for free as an open source project, and have a "Try on Koding" button on your project page that will spin up a stack for users to start developing with.
I am wondering if it would be worthwhile pursuing how we might use this with the pakyow project. It seems like it might be a really slick way to help people jump right into the warmup on pakyow.org. It might cost us some money to host the stacks on something like Digital Ocean, but that could be a worthwhile expense if it gets more people trying it out.
Let me know what you think, and if we think this is something worth checking out, I'll do some digging and see what I can get going.