Here's an interesting . article on corante about Weblogs, Ideaviruses and the propagation of new information.
"it's a lot easier to blog a quick link than it is to come up with your own content! When you come across an interesting link during your surfing, just stick the link in a blog window, snippet out a quote, and (if you're up for it) add a quick comment. It may only take you a minute... but if your visitors check out the article, then they could up to half an hour of reading out of it."