Our team is using Orchard, and we're starting to think about our reporting requirement.
We're unaware of any currently available reporting module, so we're thinking of either shoeing one ourselves, or alternatively using SQL Server reporting services "alongside" orchard due to the amount of functionality you get out of the box.
The difficulty with writing the Orchard module is that we would have to code for pdf/excel export support, and also printing.
The main difficulty with SQL Server Reporting Services is that we would have to link with the existing Orchard Users/Roles module somehow.
Not really sure which way to go at the moment, thoughts and or guidance would be appreciated.