I only hope, dear readers, that you aren't as sick of reading about Katie Couric, the beleaguered anchor of the "CBS Evening News," as I am of writing about her. But the taint of plagiarism sweeping through CBS News was, quite possibly, the low point of Couric's seven-month tenure. That's saying a lot. Yes, here's yet one more column about the shooting star of the television-news business. I can take it if you can. Earlier this month, CBS put a video commentary on the Internet in which Couric lamented that children take less interest in using libraries than they used...