I know that the official comment regrading Linux support is that there are no plans to support it right now, I just want to say that there are people on Linux that are willing to pay for your product!
I'm developing cross platform mobile apps with HTML5 and I would jump at the chance of using Xamarin instead (I was a C# developer in another life).
I might just end up running it in a VM, but it would be great running Xamarin Studio on Linux.
Thanks :-)