In this report we will group by Portal, then by blog.  In each section we show the Entry Name, if it was published, the date entered, and then a number of comments roll up. Nothing fancy, just adding the bloggers name after the blog name. See Figure 1 for an idea of what the report looks like in development.

Figure 1

This report allows us to select which portal to run this on using the Portal parameter.  If you did not have many different sites, or wanted to compare the different sites, you could run the report to see the data from all the portals.