I really liked the responses to the question regarding showing a source an article before it has been published.  Why on earth would you want to give someone that kind of power over you?  Why would you allow a source to have that kind of bargaining chip?  Besides selling your story, they could also cause problems for you at your own office.

A source of mine in Washington DC asked for the link to the Setonian Online to read the story if and when it was posted.  I gladly gave it to him.  However, I would never give him the unfinished story.  He could have been Alex Ovechkin and he wouldn’t have seen it.  As one responded on the metafilter site, “If the President of the US doesn’t enjoy the luxury of reading editorial about him prior to publication, your sources don’t get to either.”