At this point, Blogpulse's trend tool is better for three reasons: 1) it allows you to go further back into the past (six months vs. three), 2) by clicking specific points on the graph, you can view blog postings for that particular day, and 3) you can compare up to three different search terms and have them show up on your graph.
This last point is best illustrated by the following graph which shows just how little most people care about political scandals. In my chart, I searched Blogpulse for the last six months for the terms "downing street memo," "cindy sheehan," and "hurricane katrina."

Categories: blogpulse, icerocket, buzz, research, blog help