Beethoven vs Backstage

Thanks to what looks like the name of a Kelloggs blog; the fantastic Tech Crunch "Dedicated to obsessively profiling and reviewing every newly launched web 2.0 business, product and service." no less I've just been trying out IceRocket (where do they get these names?) which is a v.fine new blog search/trend tool. What impresses the most are the graph tools that plot the popularity of various memes/products/posts knocking about the blogosphere.
Here's Backstage versus the BBC's Beethoven Downloads