If you want a micro-cloud with Perl (and Python), check out Stackato at http://www.activestate.com/cloud. It is based on CloudFoundry, but enhanced with the additional languages and the ability to port existing apps ('run' and 'dbshell' functionality). Stackato has also been available in the micro-cloud format for months, with docs on how you might set up your own internal private cloud.
Based on the title, for a second there, I got my hopes up that this was an easy-to-deploy cloud solution to build up a small scale cloud on-premise for testing / fun / etc.
But from what I understood, it's just a VM instance, meaning it's the runtime environment minus the actual cloud capability.
I'm sure it will be useful though for almost all developers looking to deploy on Cloud Foundry, or even anyone who just wants a VM with this specific setup (tested, working VM configurations are always nice).
I'm sure that's where it's headed. You can already build a private IaaS cloud with VMWare's ESX product line, and since their acquisition of SpringSource, who built CloudFoundry, more and more PaaS style capabilities have been produced. I'm sure it won't be long before we see Cloud Foundry Enterprise of vFabric Platform Cloud or whatever name it will be.
I used GAE-J in the past, from preparing the environment to deploying to GAE server, the experience was a breeze.
I got CloudFoundry invite last month and I lost appetite pretty quick after checking their documentation.