How about creating a way for clients to log into the system to grab their reports?
Broadcasts can be set up as internal or under a client. A user could also be set up as an internal user or a client. Then a client could view their reports in the system without being able to see other clients' reports.
The added benefit for you is that the your software will get a little bit of advertising should the pages still say arpReach.
With that said, the ability to have reports sent to an email address automatically 1, 2, or 5 days after the campaign would be great too.