Online social network giants MySpace and Facebook battled for supremacy in 2008.  The trend lines below show the percentages of consumer-generated online discussions that mentioned each site between June and December:

Meanwhile, Twitter ’s online buzz slowly picked up this fall, almost matching buzz levels for Web video goliath, YouTube:

The release of the new iPhone 3G generated a huge online buzz spike in July: 

Detroit auto industry executives’ Congressional testimony in November also triggered a rash of blog discussions around the executives’ mode of travel to Washington, D.C. — via corporate jet and, later, by hybrid car: