The Mono team (well, Novell) created a mono-development-environment-in-a-box as an VMware Image. You can grab it at the source.
“The image is a SUSE Linux Enterprise Desktop 10, and it includes the latest version of Mono, the development tools, documentation and samples for Windows.Forms and ASP.NET.
The MonoDevelop IDE is included in the image for developers, and Postgress and MySQL are installed to test your application with a database.”
I’ve made some screenshots:
explore the WinForms implementation of mono
Source: Mono VMware Image