It's been two business days since the status change.
No dice.
I did find someone else's approval letter:
http://travelwithgrant.com/wp-conten...d-Document.png
As tempting as it is to forge my own, I suspect the federal govt would not be too pleased if they found out. So instead...
I'm going to print out all the necessary information that I have in my profile. The only thing that I can see that's unique about the letter is the application ID number, so I'm going to make sure I have those printouts for my interview next week.