Just noticed this latest widget from Digg, called the Arc. It’s a graphic representation, like their swarm, stack and BigSpy, of who is selecting what stories on Digg. Stories arrange themselves around a circle as users digg them. Stories with more diggs make thicker arcs. They also offer the Arc as a screensaver (clever). These kind of graphic representations can be put to good use by sites that have big volumes of traffic and content — and, if done correctly, can add value and be another way of surfing a site. Plan to do some of these for the new M&G Online redevelopment, much like our current photo swarm created earlier this year for the news in photos site. Dig it.