We occasionally get requests for custom reports, and most of the time we are able to just add them in the shipping product. However, we know that customers also have the skilled staff to write the reports themselves, and not have to wait for the next release.
The downside to this is that GWI then is not aware of what could be a great addition to the built in reports. We could take a stab and bloat the list of reports, or you can tell us about your custom reports.
And how about reports on Surveys or Archives? Are you finding that reporting on those modules is sufficient or that you are needing to write a bunch of reports for those two modules yourself?