Just how much data does the average American consume on a daily basis?

Grant McCracken wrote a salient blog post recently that discusses the difficulties of keeping up with all the information there is to keep up with. He voices the need for better “knowledge architecture” – new services that can discover, aggregate, filter and organize information in ways that are relevant, and make sense for individual users.
Grant talks about this need for better knowledge design:
The upshot of this conversation for me was that a market in the information space is emerging.  I won’t pay anything for access to the New York Times.  This is an interesting aggregator, but it’s way too chunky [...]