"Nintex Reporting 2008 ships with dozens of pre-built reports covering the majority of SharePoint objects and activities. Report customization is provided via a simple web page interface designed for any user to select different parameters and personalisation options. System administrators can also perform more extensive report authoring by editing the XML report definition files."
More descriptive text on the web page.
Pricing (June 2008):
"Single Server Nintex Reporting 2008 license is priced at $8750
Nintex Software assurance is priced at $1925
Reporting Farm Nintex Reporting 2008 license is priced at $17,500
Nintex Software assurance is priced at $3850 "
(Other numbers for different currencies)