In the previous project I was working on, we needed exactly the same thing that we did - just run Windows in a virtual machine (using Parallels) and save the source code of the MonoTouch solution on Windows, and then use Parallels to exchange information with OSX where we will develop using MonoDevelop. On Windows, we just used Visual Studio to transfer the code to TFS.
This is not the best solution, but it worked well. A good side effect is that you can always open several classes in VS + Resharper and clear the code faster, and it automatically appears in MonoDevelop.
Eduardo scoz
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