Steve Rubel alerts us to  PRWeb’s use of trackbacks, presumably to support the universal use of said technology.
He raises a great question:
So, here’s a question. Will press releases ever gain the ability to
also send trackbacks? I imagine this would cause blogger outrage.
Taking this a step further, if trackbacks become a web standard, what
will happen when [...]

PRWeb is preparing a  service for PR professionals and businesses that should simplify press release syndication.  RSSPad is not currently working, but you can see a sneak peek of it here.