We all know blogs are burgeoning, but to what extent? Technorati says 7.4 million blogs posted in the last 4 months; collectively, blogs post approximately 1 million posts per day. What about crossover into traditional news outlets? Over 95% of the top 100 U.S. newspapers have reporter blogs to supplement their online coverage.

Technorati characterizes bloggers as savvy and self-sufficient. Most bloggers have blogged 3 years on average and the majority use at least 5 approaches to drive traffic to their blogs. The top reasons cited for blogging were self-expression and the desire to share. The largest indicator of a “successful” blog was personal satisfaction.

Over half of surveyed bloggers reported heightened visibility in their industry due to their activity. One in five have been on TV or the radio in connection with their posting. One third of bloggers have been approached to be brand advocates.

Enough food for thought? This is only the tip of the iceberg. The Technorati State of the Blogosphere 2008 is well worth the read. Check out the full feature here.