I do not know of any additional reports that are available.
I am developing custom reports for UCCX 7.0. In order to create custom reports, you need to have Crystal XI, and be able to do some SQL and XML work. Let me know if you have any specific questions about the development process. Chapter 6 of the UCCX HR Administrator and Developer Guide covers custom report development. There are some errors in it, but those are well documented in this forum.
Regards,
Peter