The vote for this are very fragmented with multiple suggestions for this feature. In some cases, the request is buried with other feature requests making it hard to find. I've picked one so that we can concentrate our votes and hopefully make a difference.
Suggestion 685548 covers adding FRx style Row Linking to Management Reporter
The GP team provides some options for MR at http://blogs.msdn.com/b/dynamicscpm/archive/2011/08/09/management-reporter-advanced-reporting-scenarios-and-features.aspx