I have one Windows 2000 DC left. I won't be able to replace the hardware until later next year and it is not worth the time to upgrade it right now. I am introducting a Windows 2008 R2 DC to my forest. I am running in 2000 Native mode.
I am clear that I can stay where I am and I will not be able to take full advantage of features until I upgrade it. However, I just wanted to run it by you all to see if you think I'll have any issues running 2008 R2 DC at this functional level.