I had an issue where the list was not displaying my submitted apps. Originally I had placed it in a panoramaitem, inside of a stackpanel. However, once I replaced the stackpanel with a grid the list updated correctly. I highly recommend using this as it's simple to use.
Is there a way to allow the publishername to be databound? I find if I override the DataContext property things don't work so I have the name hardcoded.