When will we have a way to have students submit work through iTunes U, like a DropBox feature?

iTunes U is a great way for teachers to communicate with students in k-12 schools that have a 1:1 initiative, BUT there is still a lot missing. For example, we need a way to allow students to not only receive information, but turn it in. Without this, iTunes U is not a leader in CMS - curriculum management systems. When will a dropbox feature be added - will it be added?