Actually it is possible to link an article to more than one forum. Go back to the article publisher, click on 'My Publisher', choose the appropriate folder and click 'Edit' next to the article you want to edit. Then just scroll to the bottom of the screen and choose a second forum in the pull down menu next to 'add a new targeted forum'.
edit: LOL I need to check the original dates on threads before I post to them. I bet you already know all this info I just gave you, by now!