Fritz and Venemous Kate have both posted statements on citing sources when updating blog entries. I really have no idea what all the fuss is about…I guess some people get off on plagiarizing popular stories, passing them off as their own and trying to stake claim to being the first one on a scoop.
Personally, I find that tracking back to the original source is more fulfilling. Not only do you expose your audience to a larger selection of content but, if the original source has trackback enabled, you get your own URL pimped on a popular site! It’s hardly a difficult decision.