Reading a blog can become as much of a habit as checking e-mail, a new study looking at readers, rather than bloggers, suggests.Researchers from the University of California-Irvine presented their study, which they said was the first to look in depth at the readers of blogs, on Wednesday at the Association for Computing Machinery Conference on Human Factors in Computing Systems (CHI) in Florence, Italy.In a release, they said that previous studies about blogs have typically focused on the writer