I wrote them about this recently, actually, and it seems that they're not likely to make a change like that anytime soon. And honestly in a few years there'll be no need for it since you'll be able to run even native applications inside of a protected virtual environment - this is already routine on servers thanks to VMWare, you run each server inside of its own virtual machine and there's no way it can compromise the rest of the system. Since most new desktop processors now include Intel's IVT instructions (which make virtualization fast and easy) it shouldn't be long before we start to see this approach used on desktop software too - I wouldn't be surprised if Windows 7 added it as an option - and eventually it could even apply to mobiles; I'm sure ARM already has somebody working on this, they have a vested interest in encouraging native development since if everybody starts writing in Java there's less of a reason for phone makers to keep using ARM chips.