I agree with Espen’s assessment that this is a good general argument for why anyone who has an abiding interest in a topic might want to consider a blog as one primary outlet for their interests. Granted, I may be biased given that I started blogging when I was a professor.
Dan Cohen has an excellent article on this topic – which, if nothing else, is a pretty good argument for blogging in general and RSS feeding in particular.
Go for it. Nothing is as eternal (and as findable) as something written in silicon. Thanks to RSS, Google, and good ol’ Gordon Moore’s law, which pretty soon will lead to a situation where we are all working off the same (virtual) machine.