I'm happy to say you are wrong :-)
There was Disapointment about that, here is the relevant bit:
UDT is licensed by number of UDT ports. This has no impact on your NPM element count. For example, if you are monitoring 2 interfaces on a switch in NPM, then you monitor all of the ports in UDT, your NPM element count will still be 3 (two interfaces and a node). This is the reason we use the language of ports versus interfaces. In general, these are the same physical (or virtual) thing. A port is a UDT licensed element and we collect connection information from it. A interface counts against your NPM license and is used to collect utilization, traffic and error data.
OK awesome, this makes me very happy to be wrong.
I am seriously digging UDT and I have multiple departments whom are interested and I was starting to wonder if we would even be able to deploy it because of what I mentioned.
But again thanks for clearing that up, now I just have to find some money somewhere :P