Also posted at Netcentric Campaigns.
For example, select from existing data "Average Gas Price by Median State Income for 1- and 2-earners" and then choose a "US state" visualization, and viola! They even have a handy "blog this" function to make it easy to insert the resulting graphic into a blog. Like so:
Available visualization types include U.S. and world geographic maps, bar charts, pie charts, scatter plots, bubble charts, a variety of graphs, and my favorite the network diagram. This is the kind of site that can absorb a whole weekend, I need to be careful… 🙂
Thanks to Bruce Hoppe for the link.