Lisa posted a video about the new Report Writer enhancements coming in Sedna (and available in the most recent CTP). You can find it in a few places (Lisa gave permission to rehost it to save on bandwidth):

 http://www.spacefold.com/lisa/SP2Demo/SednaDemo.htm - Original

http://www.craigbailey.net/downloads/SednaDemo.htm - Craig Bailey mirror

Update: Fixed Craig's URL as requested.