Every wondered where you can get a complete list web 2.0 performing companies. http://www.socialtext.net has put together such a list here
On the other side of coin Business Blog Wire have done 5 Reasons Why Your Business Blog Should Help the Poor
Both give an excellent perspective on business development.
Accenture particular sums up social media very well with this excerpt.
“A weblog is an online, semi-personal journal offering the opinion and commentary of the authors. Our blogs feature thought leadership on a wide range of business issues, with a particular focus on helping companies achieve high performance. Here you’ll also find blogs about emerging technologies and career experiences from select employees. The opinions of the writers do not necessarily reflect the position of Accenture on these subjects.”