BlogScope.net

BlogScope is an analysis and visualization tool for blogosphere which is being developed as part of a research project at the University of Toronto. It is currently tracking over 16.54 million blogs with 162.66 million posts. BlogScope can assist the user in discovering interesting information from these millions of blogs via a set of numerous unique features including popularity curves, identification of information bursts, related terms, and geographical search.

A nice website for us to search for information on blogs. More comments and more views :D.

Besides that, it also have Popularity Curve in bar graph form.
In this example, search: blogscope

Another feature is that, you can use Geographical Search or GeoSearch to know where the items you search for came from.

The next feature would be the Comparison Curve. It compares 2 query that you wanted to compare.
For example, compare: New York and Toronto.

The last feature would be Summary Cloud .