Awesome project created by an undergrad at Brown!
"Cubism.js is a D3 plugin for visualizing time series. Use Cubism to construct better realtime dashboards, pulling data from Graphite, Cube and other sources. Cubism is available under the Apache License on GitHub."
A somewhat hard-to-find-but-useful set of ggplot2 examples buried on Hadley Wickham's site.
I saw this on a few different visualization and statistics websites. It's a nice set of maps.
I think this would be pretty easy to do with gpplot2, but Portfolio looks like its worth checking out too.
Cool example of the effects of outliers on regression models.
Beautiful visualization. Interesting and informative display.