If you think you’ve seen it all – talking banners, moving towers, flying birds – get ready for this one. The Wall Street Journal Online at WSJ.com today introduced a new option for advertisers called the Brand Launch Unit.

In the last few months, nearly two dozen researchers, investment banking firms, analysts and ad agencies have reported estimates of online advertising revenue for 2001. But the range is wide, from a low of $2.5 billion to a high of $19.0 billion – enough to make anyone’s head spin. What's the real number?