Windows 2000 Server vs. Adv. Server

Got a question here. I have an NT 4 server that is a member server of an NT 4 domain, that is staying an NT 4 domain, at least for a while. I am planning to upgrade this member server this weekend to Windows 2000 server. Because we are also looking at clustering, I was thinking about installing Adv. Server instead. Can an Adv. Server be a member of an NT 4 domain?