From Physics Web, a very neat piece on how long people generally read a news story after it appears on the Web. Short answer, less than two days :
If you think you're reading the news, be warned that this story -- and any other on the web -- will be barely read by anyone 36 hours after it was first posted. That's the message from a team of statistical physicists who have analysed how people access information online.
Very interesting for any blogger trying to attract readers to their site, as I am sure the same general principle applies.
Hint: Keep cranking out them posts.
PS. Am still on West Coast. Won't be posting again until Friday/Saturday.