Instead of waiting for this functionality to be implemented why don't you use a Virtual Machine? I have a mac too and I find it to be much easier to run a Virtual Machine in OSX than deal with having to restart every time you want to switch operating systems. VirtualBox is pretty good and free. Parallels has more features but it also costs money. You could also use VMWare Fusion. Honestly VirtualBox is good enough and has enough features. One thing that is for sure, they are all compatible with Windows 7. I have had no problems on both Leopard and Snow Leopard running Windows 7 in a Virtualized Environment.
To answer your question in the comment. According to this article there are other virtualization options for Mac OS. How good they are, and if they are free, you will have to look into yourself. If I was you I would just use VirtualBox. Just because it's free doesn't mean you shouldn't give it a chance.