I got an email this morning with saying my digital copy was ready for download. If you ordered directly from SE and are in the US (not sure how the EU store works) just go to findmyorder.com and enter your order number. You will see that its updated with an unlock code (which I dunno if digital non-collectors got) and a serial code (or key). That serial code is the one you want.

I was able to update everything on the Mog Station this morning and get my CE items when I logged in.