This is interesting that iReports could be installed elsewhere. My understanding is that iReports needs direct access to the sqlserver (UR Repository). We do not expose the sqlserver to the internet, so it's not clear to me how we would get that to happen so that a customer could install iReports in their environment (say, on the NoD Relay) and use it there.
I'd welcome help exploring that further. It would be very cool.
Regarding iReports on the tial Instance, itself:
At present, iReports is not installed on the NoD image by default. If required, it can be added on request. (Since March, there's been two requests to do so.) If an SE needs iReports added to a trial instance, please open a (private) case under the prospect's account and contact records stating that you need iReports installed. The ticket will find it's way to the NoD Operations team who will get it installed and notify you when it is ready.