The Silverlight PivotViewer Сontrol is a new way to display SharePoint 2010 Enterprise Search Results. It’s another way to interact with massive amounts of data on the web in ways that are powerful, informative, and valuable. Tested on FAST Search 2010. Should works for SharePoint standart and enterprise search too.
Use Microsoft PivotViewer control http://www.silverlight.net/learn/pivotviewer/
SharePoint People Search Pivot Viewer WebPart