I've always felt you should never call out someone if you are doing the same thing you are calling them out for. [ed. note: Wow, my high school english teacher would scream if she saw that line.]
After some media outlets suggested that Barack Obama may be guilty of plagiarism in a recent campaign speech, Hillary Clinton basically came right out and said as much during the most recent democratic debate in Texas.
However, here's a link on cnnpolitics.com suggesting that Senator Clinton is guilty of the same charges. And while Senator Obama used a suggested line from one of his campaign co-chairs, Senator Clinton stole her lines from former candidate John Edwards. I'm sorry, but I think biting lines from a former opponent is a little different than using a passage written by someone on your own campaign team.
But having said that, I tend to agree with Senator Obama on one thing about this issue. It's really silly. I hope both sides of this campaign drop this topic and drop it quickly. It's simply too petty to even discuss. There are much more important issues to debate.