Hello - I am just chuck full of ideas for you... hope you don't mind.
I have noticed that some of my reports look really great when I "group" the results in the web app. Meaning, taking the coloumn heading and dragging it up top to sort/group by that field.
It would be really cool to add this option to the report builder so that you can make some reports display "grouped" by field X by default, but still have the option to change that in the web version as the person sees fit.