<A target="_blank" href="http://bloginprogress.us/blog/BlogInPr.nsf/dx/r8vsr4">David N Schaffer has a Notes 4 server</A> running. It's been running for years and is even in its own Domino domain. Until he upgraded the rest of his installation to ND8 it held some replicas of databases. That's when he found out how old R4 really is.