I just got a note from IANA confirming that they've assigned TCP/UDP port 1194 to OpenVPN.
You can see the allocation here in the global list: http://www.iana.org/assignments/port-numbers The question, of course, is when should we switch over to using 1194 as the default? (We're currently using 5000 which doesn't really belong to us.) I'd be inclined to make the change before 2.0 final is released. Any other opinions? Of course, this will be moot for those of you who select your own port number using the "port" directive. It's only a question of changing the default from 5000 to 1194 when no "port" directive is specified. James