For the last several months I have been working on an extension with Cloud Foundry V2 that allows users to deploy Windows / .NET applications: Iron Foundry.
Most of the work done here is to put in a DEA and Warden (and a couple of things) that runs on Windows. We forked the ruby DEA and built a .NET service to emulate the Warden.
The Warden was interesting to work on. We incorporated the use of Job Objects to limit CPU and memory to the process we host. We either host your executable or host your web app in a host that uses HostableWebCore. (Right now we support .NET apps.)
We really want to get feedback from developers. So sign up to get an account and start deploying apps.
To learn more go read the intro blog post.