...like we used it back in the day for pure traffic plays from venues like Yahoo Picks (gone now, but New and Notable Sitesremains), or USA Today Hot Sites. The value of those was–like Digg today–in the amazing traffic spike they caused...
http://searchengineland.com/how-social-media-becomes-link-fertilizer-13503
...strategy. Gartner's report, he added, indicates that the business potential specifically for social networking web sitesremains largely untapped, though these sites will become increasingly critical as large companies seek to edge out the competition...
http://www.hookthenet.com/pr/21211