One of the weird quirks about CampusFrance is that they don't take any sort of online payment. So, I sent them a money order, but I sent the first one for the wrong amount. So that was a bit of a hassle because they had to mail me back the original one and I had to send them a new one before they could process my application. But, it all worked out and I got approved through CampusFrance, so now I'm half-way to having an official long-stay visa!
Now all I have to do is go to the French consulate in Chicago and give them a mountain of paperwork and hopefully get approved for my actual visa!