Despite a still niche reach, blogs on the top 10 U.S. newspaper sites had a tremendous growth from Dec. 2005 to Dec. 2006, according to Nielsen NetRatings, SFN's World Digital Media Trends 2007 reported.

The top 10 newspaper sites in the United States reached 27.4 million unique audience in Dec. 2005. The number increased to 29.9 million after one year.

The audience of these online newspaper blogs is much less, with only 1.2 million in Dec. 2005. However, the number boosted to 3.8 million one year later, according to Nielsen NetRatings. The year-over-year growth was more than 200 percent, much higher than that of the newspaper sites, which reported only 9 percent, according to the report, World Digital Media Trends 2007, released by SFN and the World Association of Newspapers.