“The one thing we know about information overload on the Web is that we don’t know enough. The rapid rate at which people and organizations create and propagate information complicates our getting a grip on information overload in the domain of information technology. Our information includes things like our Honey-Do lists, gigabytes of digital documents, and the deluge of email messages that pile up in our email inboxes. The amount of information we consume and manage is growing in both its volume and volatility. Probably worse than the self-inflicted burden of information glut that we’ve invented for ourselves is the fact that the less we know about information overload, the less we can know about the relevance of our collective stockpiles of information.”
Info overload gets to be a IA/UX issue as well.