The Marketing Channels report is great for giving an overview of performance segmented by traffic source. It does of course require Bounce Rate to be available by default as a metric so that it can be used properly.
However my request here is to add standard functionality to link the Marketing Channels report to Entry pages (and ideally Entry Site Sections). I think for any analyst, the ability to break down traffic sources by entry points is key for understanding and contrasting performance. This is possible in Discover but not SiteCatalyst.