You now can drag & drop documents into that folder. The standard Notes mail template contains code to recognize when you want to drop into that special name.
Tip: when dragging from other folders than the inbox use Ctrl+Drag, so Notes will retain the folder information (and yes - I'm getting myself a Huawei E5 router). You will be prompted to archive the documents:
While this is sweet and easy you would now have to wait until archival is complete. Waiting for a computer to finish its work is the last thing I want to do, so I say NO. With a few extra steps the documents still get archived away. Let me show you.