R2 will be released the same day as Windows 7 apparently. But some people will get it sooner or later (MS Select)
You can test the new Hyper-V on the RC, there's even a RC hypervisor only install knocking around that's easy to install and test.
I've just bought a chunky new server in preparation, as we'll finally migrate from VS2005 when Hyper-V R2 comes.