I just read about this open source project at http://uhurusoftware.com/
. Looks really cool if it works and you are a .Net developer. It is designed to allow VisualStudio and any .Net code to work with VMware's Cloud Foundry PaaS offering, though from what I read, it should work with pretty much any service, not just Cloud Foundry. VMware also released their MicroCloud platform - essentially it is a single machine instance of Cloud Foundry to make developing against Cloud Foundry easier. If Uhuru lives up to it's advertising and you have the MicroCloud, you should be able to fully develop cloud based software in your own machine using .Net and deploy anywhere.
Check it out and let me know what you think. I am curious because I am 1) not a developer per se (hobbiest at best - and a bad one at that), and 2) what I tool around with is Java, not .Net, at least not yet.