@verdandi, I am also waiting on Vanderbilt from your list, along with every other place I applied to. I've emailed Vanderbilt regarding this, and if they respond I'll pass it on to you! Getting quite jittery, but here is to hoping no news is good news for all of us!
In case its of any help, a poster on a different forum mentioned they got in touch with Penn State, and the reply more or less confirmed that they review intl applicants later on in mid Jan. Perhaps this is true for other programs as well. You can see the post here-