Last week, blogs were being discussed on CBC Radio One and Tod Maffin suggested that blogging was on its way out. A different perspective from Kathleen is that blogs help you get what you need done. She needed help and posted it on a blog, and the right person, with the right experience contacted her.
I absolutely love how the peer-to-peer network in the blogging world led me directly to the right person.
If blogs are also perfomance support tools (in addition to knowledge repositories, etc.) then blogging may be around for a while yet.