This site displays a list a DDOS attacks that are happening at any time. This graphic shows a 300Gbps DDOS in the United States that lasted for six days. Fascinating (and a reminder that you can’t handle DDOS on your enterprise WAN connection).
Digital Attack Map is a live data visualization of DDoS attacks around the globe, built through a collaboration between Google Ideas and Arbor Networks. The tool surfaces anonymous attack traffic data to let users explore historic trends and find reports of outages happening on a given day.